Achilles Tendinopathy: Is Rest Enough and When Is Imaging Useful?

Direct Answer

Complete rest is rarely enough to resolve Achilles tendinopathy because rest does not restore the tendon’s capacity to tolerate walking, running and jumping. Treatment usually centres on managing aggravating activity and progressively strengthening the calf–Achilles unit. Ultrasound or MRI may be useful when the diagnosis is uncertain, rupture is suspected or symptoms are not improving as expected, but routine imaging is not always necessary.

What is Achilles tendinopathy?

The Achilles tendon connects the calf muscles to the heel bone. It stores and releases energy during walking, running, climbing, jumping and changing direction.

Achilles tendinopathy is a clinical condition involving pain and reduced function in the tendon. It commonly develops when the tendon is exposed to more load than it can presently tolerate.

Possible triggers include:

• A rapid increase in running distance or speed
• More hill or stair training
• Returning to sport after inactivity
• Repeated jumping
• A change in footwear or running surface
• Reduced calf strength
• Insufficient recovery between demanding activities
• A sudden increase in walking during travel or work
• Resuming exercise too quickly after illness or injury

The term “Achilles tendinitis” is still commonly used, but “tendinopathy” is generally more accurate for persistent symptoms. Long-standing tendon pain is not explained by inflammation alone.

Are all Achilles tendon problems the same?

No. Identifying the location and pattern of symptoms matters because different parts of the tendon may require different exercise modifications.

Midportion Achilles tendinopathy

Midportion symptoms are usually felt several centimetres above the heel.

Common features include:

• Pain or stiffness after rest
• Morning stiffness
• Pain at the beginning of activity
• Temporary improvement after warming up
• Pain returning during or after prolonged activity
• Local thickening or tenderness
• Reduced calf strength or endurance

Insertional Achilles tendinopathy

Insertional tendinopathy affects the point where the tendon attaches to the heel bone.

Symptoms may be aggravated by:

• Shoes pressing against the back of the heel
• Uphill walking or running
• Deep ankle dorsiflexion
• Calf stretching over a step
• Exercises that lower the heel below floor level

Insertional pain may coexist with changes around the heel bone or an irritated nearby bursa. Rehabilitation may initially need to limit compressive positions.

Achilles tendon rupture

A rupture is different from tendinopathy. It is a partial or complete tear that may occur suddenly.

Possible features include:

• A sudden snap or pop
• A sensation of being kicked at the back of the ankle
• Immediate difficulty pushing off
• Inability or marked difficulty performing a single-leg heel raise
• Weakness when pointing the foot downwards
• A gap in the tendon
• Bruising and swelling

Some people can still walk after a rupture, so the ability to walk does not exclude it. A suspected rupture requires prompt medical assessment.

Why does the Achilles tendon become painful?

Achilles pain is often associated with a mismatch between the tendon’s current capacity and the load being placed on it.

For example, a tendon accustomed to two short runs per week may become symptomatic after:

• Several consecutive days of running
• Adding hill sprints
• Increasing distance sharply
• Starting a jumping programme
• Changing to a sport with more acceleration

This does not necessarily mean that the tendon has been permanently damaged. Tendons can adapt to load, but adaptation takes time.

Pain can also be influenced by:

• Previous Achilles problems
• Calf weakness
• Reduced ankle movement
• Diabetes or metabolic health
• Higher body weight
• Age-related tendon changes
• Certain inflammatory conditions
• Some medicines

Fluoroquinolone antibiotics and systemic corticosteroids have been associated with increased tendon injury risk in susceptible individuals. Anyone who develops new Achilles pain while taking these medicines should discuss it with the prescribing clinician rather than stopping prescribed medication independently.

Does pain mean the tendon is tearing?

Usually not.

Achilles tendinopathy pain does not automatically mean the tendon is progressively tearing with every step. Pain intensity also does not precisely measure the degree of structural change.

However, sudden severe pain, a pop, abrupt weakness or loss of push-off strength raises a different question and should be assessed for rupture.

The distinction is important:

Tendinopathy pattern	Possible rupture pattern
Gradual onset	Often sudden onset
Stiffness after rest	Sudden snap or pop
Pain during or after loading	Immediate weakness
Activity may become easier after warming up	Difficulty pushing off
Strength may be reduced gradually	Sudden loss of strength
Symptoms fluctuate	Acute functional loss

These patterns are not diagnostic by themselves. Clinical examination remains important.

Is complete rest the best treatment?

Usually not.

Rest may temporarily reduce pain because the tendon is exposed to less load. However, prolonged avoidance of activity can reduce calf strength and tendon capacity. Symptoms may then return when normal activity resumes.

A more useful approach often involves relative rest or load modification.

This may mean temporarily reducing:

• Running distance
• Running speed
• Hill training
• Jumping
• Consecutive training days
• Prolonged walking
• Activities that repeatedly cause a substantial flare

The aim is not to eliminate all movement. It is to find a tolerable activity level while beginning a structured rehabilitation programme.

Walking, cycling, pool exercise or modified gym training may remain possible, depending on symptoms and the diagnosis.

Should all painful activity be avoided?

Not necessarily.

Some discomfort during rehabilitation may be acceptable, provided that:

• The pain remains within an agreed, manageable range
• Movement quality is not significantly altered
• Symptoms do not escalate throughout the session
• The tendon settles within a reasonable period afterward
• Pain and stiffness are not progressively worse the following morning
• Function is improving over time

There is no universal pain threshold suitable for everyone. Pain-monitoring rules should account for the individual’s condition, goals and response.

A person with mild tendinopathy returning to recreational jogging requires a different plan from someone with severe insertional pain, a suspected partial tear or high-level sporting demands.

What is the main treatment for Achilles tendinopathy?

Progressive tendon-loading exercise is generally the central treatment.

The objective is to improve the capacity of the calf muscles and Achilles tendon to tolerate the forces required for everyday activity and sport.

A programme may progress through:

1. Lower-load calf contractions
2. Double-leg calf raises
3. Single-leg calf raises
4. Heavier resistance exercise
5. Faster calf work
6. Hopping and energy-storage exercises
7. Running or sport-specific loading

Not everyone begins at the same stage. Exercise selection depends on pain, strength, symptom location and functional goals.

Current clinical guidance supports tendon-loading exercise as a first-line intervention for midportion Achilles tendinopathy, generally performed at least several times per week at an intensity the patient can tolerate. 2024 Achilles tendinopathy clinical practice guideline

Is eccentric exercise the only effective programme?

No.

Eccentric exercise involves strengthening while the muscle–tendon unit lengthens, such as slowly lowering the heel. It has been widely used for Achilles tendinopathy and can be effective.

However, it is not the only reasonable loading method. Other approaches include:

• Slow concentric and eccentric calf raises
• Heavy slow resistance training
• Isometric exercise
• Progressive functional loading
• Plyometric exercise during later rehabilitation

The important principles are appropriate dosage, progressive challenge and consistency—not allegiance to one named protocol.

Exercise should also match the type of tendinopathy. For example, repeatedly lowering the heel below a step may aggravate insertional Achilles pain because it increases compression at the heel attachment.

How long does rehabilitation take?

Achilles tendinopathy often improves over months rather than days.

Some patients notice meaningful improvement within six to twelve weeks, but returning to full running or sport may take longer. Long-standing symptoms, substantial weakness, insertional disease and repeated flare-ups may extend recovery.

Progress should be assessed using more than pain alone.

Useful measures include:

• Morning stiffness
• Walking tolerance
• Number and quality of calf raises
• Calf strength
• Ability to climb stairs
• Running or jumping tolerance
• Recovery after exercise
• Participation in work or sport
• Confidence in the tendon

A lack of complete pain relief in the first few weeks does not necessarily mean treatment has failed. Conversely, repeating an unchanged programme for months without measurable progress should prompt reassessment.

Is imaging necessary to diagnose Achilles tendinopathy?

Often, no.

Achilles tendinopathy can commonly be diagnosed from:

• The location of pain
• The pattern of stiffness and loading-related symptoms
• Local tenderness
• Tendon thickening
• Pain during calf loading
• Assessment of strength and function

Imaging findings must be interpreted carefully. Ultrasound or MRI may show tendon thickening or altered tendon structure in people who have few or no symptoms.

Similarly, the degree of visible tendon change does not perfectly predict pain or recovery time.

A scan is most useful when it answers a clinical question and may change management.

When is ultrasound useful?

Ultrasound can assess:

• Tendon thickness and structure
• Partial or complete tears
• Movement of the tendon
• Blood flow detected with Doppler techniques
• Fluid around the tendon
• Superficial bursae
• Some other causes of posterior ankle pain

Advantages include dynamic examination, accessibility and the ability to compare the painful and unaffected sides.

Limitations include:

• Dependence on operator technique and experience
• Difficulty interpreting structural abnormalities that may not be painful
• Less complete assessment of some deeper structures
• A tendency for patients to assume that visible abnormalities determine prognosis

Ultrasound may be particularly useful when rupture, partial tearing or another superficial soft-tissue problem is suspected.

When is MRI useful?

MRI may be considered when:

• The diagnosis remains uncertain
• Symptoms are atypical
• A partial tear or another injury is suspected
• Pain persists despite an appropriate rehabilitation programme
• Surgery is being considered
• A deeper bone, joint or soft-tissue condition is possible
• Ultrasound findings do not explain the clinical presentation

MRI provides detailed images of the tendon and surrounding tissues. However, more detail does not automatically mean that MRI is the correct first test.

For straightforward Achilles tendinopathy with a typical history and examination, MRI may not change treatment.

What else can cause pain near the Achilles tendon?

Pain at the back of the ankle is not always Achilles tendinopathy.

Other possibilities include:

• Achilles tendon rupture or partial tear
• Retrocalcaneal bursitis
• Superficial heel bursitis
• Haglund-type heel prominence
• Posterior ankle impingement
• Plantaris tendon-related pain
• Calf muscle injury
• Nerve irritation
• Referred pain from elsewhere
• Inflammatory arthritis or enthesitis
• Infection, although this is uncommon
• Bone stress injury or another heel disorder

Pain location, onset, medical history and examination help distinguish these conditions.

Do anti-inflammatory medicines help?

Anti-inflammatory medication may provide short-term pain relief for selected patients, but it does not restore tendon capacity.

Achilles tendinopathy is not simply an inflammatory disorder, especially when symptoms have been present for a prolonged period. Medication should therefore not replace load management and rehabilitation.

Suitability depends on factors such as:

• Stomach or ulcer history
• Kidney function
• Cardiovascular risk
• Other medicines
• Pregnancy
• Allergies
• Age and general health

A doctor or pharmacist can advise whether a medicine is appropriate.

Does shockwave therapy help?

Extracorporeal shockwave therapy may be considered for selected patients with persistent Achilles tendinopathy, particularly when a well-structured loading programme has not produced adequate improvement.

Evidence suggests that it may help some people, but:

• Results are not uniform
• Protocols vary
• It should not replace progressive rehabilitation
• Evidence differs between midportion and insertional disease
• It is not appropriate for an acute rupture
• The diagnosis should be reviewed before adding treatment

Shockwave is therefore better viewed as a possible adjunct than as a guaranteed solution.

Are injections recommended?

Injection decisions around the Achilles tendon require caution.

Corticosteroid injections

Corticosteroid should generally not be injected directly into the Achilles tendon because of concern about tendon weakening and rupture. In selected situations involving a nearby structure rather than the tendon itself, an experienced clinician may consider an image-guided procedure after weighing the risks.

Platelet-rich plasma

PRP has been promoted for Achilles tendinopathy, but evidence has not consistently shown a clinically important advantage over appropriate rehabilitation or placebo procedures. Preparation methods also vary.

It should not be presented as a proven way to regenerate or permanently repair the tendon.

Other injections

Other substances and procedures have been studied, but evidence quality and availability vary. Some approaches remain experimental or are not established standard care.

Before considering an injection, it is reasonable to ask:

• What precise structure is being targeted?
• What is the quality of evidence?
• What are the risks?
• Will rehabilitation still be required?
• Is the treatment routinely recommended or experimental?
• Is it appropriately regulated and available in Singapore?

Is stretching helpful?

Stretching may help some patients when calf tightness or restricted ankle movement is relevant. It is not mandatory for every case.

Aggressive stretching may aggravate insertional Achilles tendinopathy by compressing the tendon against the heel bone. In that situation, temporarily limiting deep dorsiflexion may be appropriate.

Stretching should therefore be selected according to the diagnosis rather than prescribed automatically.

Do heel lifts or supportive shoes help?

A temporary heel lift may reduce strain or compression on the Achilles tendon in selected patients. Footwear that avoids pressure at the back of the heel may also help insertional symptoms.

These measures may reduce discomfort while the tendon is rehabilitated, but they generally do not replace strengthening.

There is no single shoe type that treats Achilles tendinopathy for everyone.

When should the diagnosis be reassessed?

Reassessment is reasonable when:

• Pain is not improving after an appropriate period of rehabilitation
• The pain location is changing
• Weakness is increasing
• The tendon repeatedly swells
• Exercise cannot be progressed
• The person cannot return to ordinary walking or work
• Symptoms repeatedly relapse despite sensible load management
• There is marked asymmetry in calf size or strength
• The diagnosis was made without examining the tendon
• Treatment has consisted mainly of passive modalities
• The symptoms do not fit Achilles tendinopathy
• A partial tear, inflammatory condition or other diagnosis is possible

Reassessment may review the diagnosis, exercise dosage, recovery time, footwear, training load, medical contributors and whether imaging is likely to alter treatment.

When is a specialist or surgical opinion appropriate?

Most people with Achilles tendinopathy do not need surgery.

Referral may be considered when:

• The diagnosis remains unclear
• A rupture or significant partial tear is suspected
• There is persistent functional limitation despite comprehensive rehabilitation
• Imaging identifies a structural problem that may require intervention
• Symptoms remain unacceptable after an appropriately delivered non-surgical programme
• Another medical or inflammatory condition may be contributing

Surgery may be considered in selected cases of persistent tendinopathy, but it carries risks and requires postoperative rehabilitation. It should not be presented as the automatic next step after a short course of physiotherapy.

When does Achilles pain require urgent assessment?

Seek prompt medical attention for:

• A sudden pop or snap
• A sensation of being kicked behind the ankle
• Abrupt loss of push-off strength
• Inability to perform a heel raise after an acute injury
• A new gap felt in the tendon
• Rapid swelling or extensive bruising
• A hot, red and markedly swollen area with fever
• A wound or infection near the tendon
• New calf swelling accompanied by chest pain or breathlessness
• Sudden symptoms after starting a medicine associated with tendon injury

Early assessment is particularly important when rupture is possible.

Practical considerations in Singapore

An initial assessment may be obtained through a polyclinic, general practitioner, private medical clinic or emergency department, depending on how suddenly the symptoms began and whether rupture is suspected.

For persistent but non-urgent Achilles pain:

1. A clinical assessment may establish whether the presentation is typical.
2. Physiotherapy may address strength, loading and return to activity.
3. Ultrasound or MRI may be arranged when medically appropriate.
4. Referral onward may be considered if rupture, significant tearing or another condition is suspected.

Insurance and imaging requirements vary between policies. Patients planning to claim should check whether a referral, pre-authorisation or supporting medical documentation is required.

Frequently Asked Questions

Can Achilles tendinopathy heal without exercise?

Symptoms may settle with reduced activity, but rest alone may not restore the tendon’s ability to tolerate normal loading. This can lead to recurrence when activity resumes. Progressive strengthening is commonly recommended.

Should I continue running?

Some people can continue modified running, while others need a temporary reduction or pause. The decision depends on pain, morning stiffness, strength, running mechanics and the tendon’s response during the following 24 hours.

Does tendon thickening mean permanent damage?

No. Tendon thickening can remain even when pain and function improve. Structural appearance and symptoms do not always change together.

Can an MRI predict how long recovery will take?

Not reliably. Imaging may identify structural abnormalities, but recovery is also influenced by strength, loading, symptom duration, health and rehabilitation. A more abnormal-looking tendon does not always mean more pain or a worse outcome.

Is morning stiffness typical?

Yes. Stiffness and discomfort during the first steps after waking or sitting are common features. Changes in morning stiffness can also help monitor response to activity and rehabilitation.

Are heel drops suitable for insertional Achilles pain?

Heel drops below the edge of a step can increase compression at the tendon insertion and may aggravate symptoms. An initial programme performed on level ground may be more suitable, with progression based on response.

Can massage break down Achilles scar tissue?

Massage may temporarily affect comfort or calf tension, but claims that it physically breaks down harmful scar tissue or repairs the tendon are not well supported. It should not replace progressive loading.

Does PRP regrow the Achilles tendon?

PRP has not been proven to regrow a normal tendon or provide consistent benefit for Achilles tendinopathy. Evidence remains mixed, and rehabilitation is still required.

How do I know whether treatment is working?

Look for trends such as reduced morning stiffness, improved calf strength, greater walking or running tolerance, fewer flare-ups and better function. Pain may fluctuate before recovery is complete.

When should I get a second opinion?

A second opinion may be helpful when the diagnosis is unclear, symptoms do not match the imaging, treatment has not produced meaningful progress, injections or surgery have been recommended, or you remain concerned about a possible tear.

References

• Chimenti RL, et al. Achilles Pain, Stiffness, and Muscle Power Deficits: Midportion Achilles Tendinopathy—Revision 2024. Journal of Orthopaedic & Sports Physical Therapy. 2024.
• American Academy of Orthopaedic Surgeons. Achilles Tendinitis.
• de Vos RJ, et al. Dutch multidisciplinary guideline on Achilles tendinopathy. British Journal of Sports Medicine. 2021.
• American College of Radiology. ACR Appropriateness Criteria: Chronic Ankle Pain.
• Murphy M, et al. Exercise treatments for Achilles tendinopathy: a systematic review and network meta-analysis. British Journal of Sports Medicine. 2023.

This article is for general education and does not replace an individual medical assessment. Diagnosis and treatment depend on symptoms, examination findings, medical history and personal circumstances. Sudden weakness, a snap or suspected tendon rupture requires prompt medical attention. Evidence for emerging injections and procedures may still be developing, regulatory status varies, and some treatments may not be approved or routinely recommended in Singapore.

If Achilles pain is persistent, the diagnosis remains unclear or rehabilitation is not producing meaningful improvement, medical reassessment may help determine whether the loading programme should be changed or whether ultrasound, MRI or onward referral is appropriate. The Pain Relief Clinic provides assessment by a licensed medical doctor and in-house physiotherapy for integrated management where suitable.

Call or WhatsApp: +65 9068 9605

Reviewed by Dr Terence Tan, Founder of The Pain Relief Clinic — 19 September 2026