Persistent Ankle Pain After a Sprain: When Should It Be Reassessed?

Direct Answer

Ankle pain after a sprain should be reassessed if it is not improving as expected, repeatedly gives way, remains significantly swollen or prevents a gradual return to walking, work or sport. Persistent symptoms can result from incomplete ligament recovery, weakness or balance deficits, but they may also indicate tendon injury, cartilage damage, instability or an initially overlooked fracture.

How long does an ankle sprain normally take to recover?

Recovery time varies according to the structures injured, the severity of the sprain, previous ankle injuries, rehabilitation and the person’s usual activities.

A mild ankle sprain may improve substantially within one or two weeks. A more significant sprain can take several weeks or longer before walking, running and changing direction feel normal. Swelling may persist after pain and function have started to improve.

These time frames are only general guides. Recovery should be judged by progress rather than the calendar alone.

Useful signs of improvement include:

• Less pain during walking
• Reduced swelling
• Improving ankle movement
• Increasing ability to bear weight
• Better strength and balance
• Greater confidence on uneven ground
• Gradual return to work, exercise or sport
• Fewer episodes of the ankle giving way

A slow recovery is not necessarily abnormal. The more important concern is when progress has stopped, symptoms are worsening or the pattern does not fit a straightforward ligament sprain.

What happens during a typical ankle sprain?

Most ankle sprains occur when the foot turns inwards, stretching or tearing ligaments on the outside of the ankle. These lateral ligaments help stabilise the joint.

Depending on the force involved, the injury may affect:

• The anterior talofibular ligament
• The calcaneofibular ligament
• Other supporting ligaments
• The joint capsule
• Nearby tendons
• Bone or cartilage within the ankle

A sprain is not simply a painful event that resolves when the swelling disappears. It can temporarily affect joint movement, muscle activation, balance, position awareness and confidence in the injured ankle.

This is why rehabilitation may need to address more than pain alone.

Why might ankle pain persist?

Persistent pain does not automatically mean that the original injury was severe or that surgery is required. Several different problems can delay recovery.

The ligament has not fully recovered

A moderate or severe ligament injury can remain painful for longer than expected, particularly during turning, jumping or walking on uneven ground.

Healing tissue also needs gradually increasing load. Too little activity can contribute to stiffness and weakness, while returning too quickly to demanding activity can repeatedly aggravate the ankle.

Rehabilitation has not restored strength and balance

After a sprain, the muscles around the ankle may become weaker and slower to respond. Proprioception—the body’s awareness of joint position—may also be impaired.

A person may feel reasonably comfortable walking on level ground but continue to struggle with:

• Standing on one leg
• Uneven surfaces
• Sudden changes of direction
• Running
• Jumping
• Landing
• Sports requiring rapid footwork

Persistent functional deficits can increase the risk of another sprain.

Chronic ankle instability has developed

Some people experience recurrent giving way after an ankle sprain. This may involve:

• Mechanical instability: The ligaments provide insufficient physical restraint.
• Functional instability: Strength, balance, coordination or confidence remain impaired.
• A combination of both

Chronic ankle instability may cause repeated sprains, discomfort, swelling or apprehension during activity. It cannot be assessed from an MRI finding alone; symptoms, examination and functional testing also matter.

A fracture was initially overlooked

Some fractures are difficult to distinguish from a sprain based only on the initial symptoms. Small fractures or bone injuries may also be less obvious on early X-rays.

Possible sites include:

• The outer or inner ankle
• The talus
• The base of the fifth metatarsal
• The navicular
• The anterior process of the calcaneus
• Other small bones around the ankle and hindfoot

Persistent focal bone tenderness, difficulty bearing weight or pain that does not improve should prompt reconsideration of the original diagnosis.

Cartilage or bone inside the joint was injured

The talar dome is the upper surface of a major ankle bone. Twisting injuries can damage its cartilage and underlying bone, producing an osteochondral lesion.

Possible symptoms include:

• Deep ankle pain
• Swelling after activity
• Catching or locking
• A sensation that something is moving inside the joint
• Persistent pain despite rehabilitation

These lesions may not be visible on an initial standard X-ray.

A tendon was injured

An ankle-twisting injury can affect nearby tendons as well as the ligaments.

Possible examples include:

• Peroneal tendon injury on the outside of the ankle
• Posterior tibial tendon injury on the inner side
• Achilles tendon injury at the back
• Tendon irritation caused by altered walking or premature return to activity

Pain location, weakness and pain with resisted movement may help identify which tendon is involved. Ultrasound or MRI may be considered when the result would influence management.

The injury was a high ankle sprain

A syndesmotic or “high” ankle sprain affects the ligaments connecting the tibia and fibula above the ankle joint.

It may cause:

• Pain above the ankle
• Pain when the lower leg is twisted
• Difficulty pushing off
• Prolonged recovery
• Pain during running or changes of direction

A high ankle sprain may require a different rehabilitation plan and, in unstable cases, surgical assessment.

Scar tissue or joint impingement has developed

After injury, inflamed or thickened tissue can sometimes become compressed during ankle movement. Bone shape, osteophytes or soft-tissue scarring may contribute to impingement.

This can produce pain at the front or side of the ankle, particularly during deep bending, squatting, running or climbing stairs.

The pain is not arising solely from the ankle

Pain felt around the ankle can occasionally originate from another location. Potential contributors include:

• Nerve irritation in the leg or lower back
• Pain referred from the foot
• Altered walking caused by knee or hip problems
• Inflammatory joint disease
• Gout or another crystal-related condition
• Less commonly, infection or another systemic condition

Reassessment should therefore revisit the diagnosis instead of assuming that every persistent symptom is simply a “slow-healing sprain.”

When should an ankle sprain be reassessed?

Reassessment may be appropriate when:

• Pain is not showing a clear improving trend
• Walking remains substantially limited
• Weight-bearing is still difficult
• Swelling remains pronounced or repeatedly returns
• There is persistent focal tenderness over a bone
• Pain is located above the ankle rather than around the usual lateral ligaments
• The ankle repeatedly gives way
• Movement remains markedly restricted
• There is catching, locking or painful clicking
• Numbness, tingling or unusual weakness is present
• Rehabilitation repeatedly aggravates the symptoms
• The person cannot progress towards work or sport
• The initial diagnosis was made without examination
• Multiple treatment sessions have produced little meaningful change

There is no universal day on which every ankle must be reassessed. The severity of the original injury and the demands being placed on the ankle matter. However, a lack of meaningful progress over several weeks usually deserves review.

Earlier reassessment is reasonable when the symptoms are severe, unusual or worsening.

What should be examined during reassessment?

A useful reassessment should do more than confirm that the ankle still hurts.

Review of the original injury

The clinician may ask:

• How did the foot and ankle move during the injury?
• Was there a snap or pop?
• Could the person continue walking?
• Where did swelling and bruising first appear?
• Was there immediate inability to bear weight?
• Was this the first sprain or one of several?
• What treatment and rehabilitation have been completed?

The injury mechanism may suggest whether the lateral ligaments, syndesmosis, tendons, bones or cartilage are more likely to be involved.

Location of pain

Precise pain location can narrow the possibilities.

Pain location	Possible structures to assess
Outside of the ankle	Lateral ligaments, peroneal tendons, fibula
Above the ankle	Syndesmosis or high ankle sprain
Inside of the ankle	Deltoid ligament, posterior tibial tendon, medial bone structures
Back of the ankle	Achilles tendon or posterior impingement
Deep within the joint	Cartilage or osteochondral injury
Outer border of the foot	Fifth metatarsal or peroneal tendon
Midfoot	Navicular, midfoot ligament or joint injury

This table does not establish a diagnosis. Several conditions can cause pain in the same location.

Movement and joint mobility

The assessment may compare both ankles for:

• Dorsiflexion and plantarflexion
• Inward and outward movement
• Stiffness
• Pain at the end of movement
• Joint swelling
• Movement at nearby foot joints

Restricted ankle dorsiflexion can affect walking, squatting, stair use and landing mechanics.

Strength and tendon function

Strength testing may examine the calf, peroneal muscles, posterior tibial muscle and other muscles controlling the foot and ankle.

Marked weakness, pain or inability to perform a single-leg heel raise can change the diagnostic question and treatment plan.

Stability and functional control

Selected ligament tests may be used to assess laxity, but no single manoeuvre proves or excludes instability.

Functional assessment may include:

• Single-leg standing
• Calf raises
• Squatting
• Stepping down
• Hopping
• Landing
• Changing direction

The appropriate tests depend on the stage of recovery and the person’s goals.

Is an X-ray needed?

Not every ankle sprain requires an X-ray.

Clinical decision rules, including the Ottawa Ankle Rules, can help identify when radiography is appropriate after an acute ankle or midfoot injury. These rules consider factors such as specific areas of bone tenderness and the ability to bear weight.

The rules help determine fracture risk during initial assessment. They do not explain every case of persistent pain and should not replace clinical judgment.

For chronic ankle pain, standard X-rays are often the first imaging test because they can assess:

• Previous or unhealed fracture
• Alignment
• Arthritis
• Bone spurs
• Joint-space changes
• Some osteochondral abnormalities
• Other structural bone changes

A normal X-ray does not mean that the pain is imaginary or that every important ankle condition has been excluded.

When might an MRI be useful?

MRI can show ligaments, tendons, bone marrow, cartilage and other soft tissues. It may be appropriate when persistent symptoms raise a specific question that cannot be answered adequately by examination and X-rays.

Examples include suspected:

• Osteochondral lesion
• Significant ligament injury
• High ankle sprain
• Tendon tear
• Occult fracture or bone stress injury
• Joint impingement
• Unexplained persistent pain

MRI should not be ordered merely because symptoms have lasted a certain number of days. It is most useful when the result may change treatment, rehabilitation, activity restrictions or referral decisions.

The American College of Radiology generally identifies radiography as the initial imaging investigation for chronic ankle pain. MRI, ultrasound, CT or other tests may then be appropriate depending on the suspected condition and radiographic findings. American College of Radiology Appropriateness Criteria

When might ultrasound be useful?

Musculoskeletal ultrasound can assess superficial tendons, some ligaments, fluid and dynamic tendon movement.

It may be particularly useful when there is concern about:

• Peroneal tendon injury or instability
• Other superficial tendon problems
• Ligament injury accessible to ultrasound
• Fluid around a tendon
• A problem that changes during ankle movement

Ultrasound is operator-dependent and cannot assess every part of the ankle equally well. MRI may be more appropriate when deeper cartilage, bone or multiple structures need evaluation.

Does persistent pain mean physiotherapy has failed?

Not necessarily.

Persistent symptoms may mean that:

• The injury was more extensive than originally thought
• Rehabilitation has not yet progressed far enough
• The exercise dosage needs adjustment
• Strength or balance deficits remain
• A particular tendon or ligament requires more targeted treatment
• Return to activity occurred too quickly
• The original diagnosis should be reconsidered

Rehabilitation commonly includes a combination of:

• Gradual restoration of movement
• Progressive strengthening
• Calf and ankle conditioning
• Balance and proprioception exercises
• Functional retraining
• Sport- or work-specific progression
• Bracing or taping in selected circumstances
• Guidance on return to activity

Manual therapy may help improve short-term movement or symptoms for selected patients, but it generally should not replace progressive exercise and functional rehabilitation.

If an appropriate programme is not producing meaningful improvement, reassessment is preferable to repeating the same treatment indefinitely.

Should the ankle be rested until all pain disappears?

Complete rest is not routinely required for an uncomplicated sprain, and prolonged immobilisation can contribute to stiffness, weakness and slower functional recovery.

Early protected movement and progressive weight-bearing are often appropriate, depending on injury severity. A brace, walking aid or temporary immobilisation may be used when clinically indicated.

Activity should be adjusted according to:

• Pain during the activity
• Swelling afterward
• Changes in walking pattern
• Recovery by the following day
• Stability and confidence
• The nature of the suspected injury

“Keep exercising no matter what” and “do nothing until completely pain-free” are both overly simplistic. The appropriate loading level lies between those extremes and should progress with recovery.

When is referral to an orthopaedic surgeon appropriate?

Most ankle sprains do not require surgery. Referral may be considered when there is:

• Persistent mechanical instability despite appropriate rehabilitation
• A displaced or unhealed fracture
• An unstable syndesmotic injury
• A significant tendon tear
• A symptomatic osteochondral lesion
• Recurrent locking or mechanical symptoms
• Persistent pain associated with a surgically treatable structural problem
• Failure to regain acceptable function despite appropriate non-surgical care

Referral does not automatically mean that surgery will be recommended. It allows the structural problem, remaining non-operative options and potential benefits and risks of surgery to be considered.

When is urgent assessment required?

Seek prompt medical attention when ankle pain is accompanied by:

• Obvious deformity
• An open wound over a suspected fracture
• Inability to bear weight after a significant injury
• A cold, pale or blue foot
• Loss of sensation or rapidly increasing numbness
• Severe pain that is escalating rather than settling
• Rapidly increasing swelling or tightness
• Fever with a hot, red and swollen joint
• New calf swelling, warmth or unexplained shortness of breath
• Sudden weakness or inability to move the foot normally

These symptoms are not typical of routine recovery and may require urgent investigation.

Practical considerations in Singapore

People with a recent ankle injury may seek initial assessment through a polyclinic, general practitioner, private medical clinic or emergency department, depending on severity.

When persistent symptoms require imaging, the appropriate test depends on the clinical question:

• X-ray is commonly used to assess fracture and bone alignment.
• Ultrasound may help assess selected tendons and superficial ligaments.
• MRI may be considered for cartilage, deeper soft-tissue, ligament, tendon or occult bone injuries.
• CT may provide more detailed assessment of selected fractures or bone abnormalities.

Insurance coverage, referral requirements and documentation vary between policies. Patients intending to make a claim should check their policy requirements rather than assuming that every consultation, treatment or scan is covered.

A medical assessment can also help determine whether imaging is likely to change management before the test is arranged.

Frequently Asked Questions

Is it normal for an ankle to remain swollen after a sprain?

Some swelling can persist after pain and walking have improved, especially after a more significant injury. Swelling should generally show an improving trend. Increasing swelling, severe pain, calf symptoms or loss of function should be reassessed.

Why does my ankle still hurt even though the X-ray was normal?

X-rays mainly assess bone and alignment. Ligament injuries, tendon problems, cartilage damage, bone bruising and some small or early fractures may not be apparent on the initial X-ray. Examination and, when appropriate, further imaging may be needed.

Why does my ankle keep giving way?

Giving way may result from ligament laxity, weakness, impaired balance, reduced proprioception or incomplete rehabilitation. Recurrent instability deserves assessment because the treatment should address the relevant cause.

Do I need an MRI if pain continues for more than six weeks?

Not automatically. The decision depends on the symptoms, examination, initial imaging and whether MRI would answer a relevant clinical question. Some patients need continued rehabilitation; others may benefit from imaging or referral.

Can I walk on a sprained ankle?

Protected weight-bearing is often appropriate for an uncomplicated sprain, but the amount depends on injury severity. Significant inability to bear weight, focal bone tenderness or worsening pain should prompt medical assessment.

Should I wear an ankle brace?

A brace may provide temporary support during recovery or higher-risk activities. It should not be treated as a substitute for restoring strength, balance and functional control. Long-term use should be individualised.

Can shockwave therapy treat an ankle sprain?

Shockwave therapy is not a standard treatment for an acute ligament sprain. It may have a role in selected chronic tendon conditions, but suitability depends on the diagnosis. Persistent post-sprain pain should be reassessed before adding another modality.

Is massage enough to rehabilitate an ankle sprain?

Massage may temporarily reduce discomfort or muscle tension, but it does not by itself restore ligament stability, strength, balance or sport-specific control. Active rehabilitation is usually important.

How do I know when I can return to sport?

Return should be based on function rather than time alone. Relevant factors include movement, strength, balance, hopping, landing, change-of-direction ability and confidence. The ankle should tolerate progressively demanding activity without unacceptable pain, swelling or instability.

When should I seek a second opinion?

A second opinion may be reasonable when pain remains unexplained, the ankle repeatedly gives way, treatment is not progressing, imaging and symptoms do not appear to match, or surgery has been proposed and you remain uncertain about the diagnosis or alternatives.

References

• American College of Radiology. ACR Appropriateness Criteria: Chronic Ankle Pain.
• Martin RL, et al. Lateral Ankle Ligament Sprains: Revision 2021 Clinical Practice Guidelines. Journal of Orthopaedic & Sports Physical Therapy. 2021.
• American Academy of Orthopaedic Surgeons. Sprained Ankle.
• RadiologyInfo.org. Chronic Ankle Pain.
• Stiell IG, et al. Implementation of the Ottawa Ankle Rules. JAMA. 1994;271(11):827–832.

This article is for general education and does not replace an individual medical assessment. Diagnosis and treatment depend on the injury mechanism, symptoms, examination findings and personal circumstances. New severe symptoms or urgent warning signs require prompt medical care.

If ankle pain remains persistent, the diagnosis is uncertain or rehabilitation is not producing meaningful improvement, assessment by a licensed medical doctor may help determine whether treatment should be adjusted or whether X-ray, ultrasound, MRI or referral is appropriate. The Pain Relief Clinic also provides in-house physiotherapy for integrated assessment and rehabilitation where suitable.

Call or WhatsApp: +65 9068 9605

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