How Foot and Ankle Pain Is Assessed: Examination, X-ray, Ultrasound, MRI and Other Tests

Short answer: Foot and ankle pain is assessed by combining the history, exact pain location, swelling or injury pattern, weight-bearing ability, skin and circulation findings, joint movement, strength, stability, nerve function and the patient’s practical goals. Imaging is then selected only when it is likely to answer a specific question or change treatment.

An X-ray, ultrasound or MRI cannot replace a clinical assessment. A normal X-ray does not exclude every tendon, ligament, cartilage, nerve or stress injury. An abnormal MRI does not automatically prove which finding is causing pain.

When to seek urgent medical assessment

Seek prompt or urgent care if:

• the foot or ankle is deformed after trauma;
• you cannot bear weight after an injury, particularly with marked bone tenderness;
• there is an open wound, visible bone or rapidly increasing swelling;
• the foot becomes cold, pale, blue, severely numb or suddenly weak;
• the calf or whole leg becomes suddenly swollen, warm or painful;
• leg symptoms occur with breathlessness, chest pain, coughing blood, faintness or collapse;
• a joint becomes acutely hot, red and swollen, especially with fever or serious illness;
• a person with diabetes, poor circulation or reduced sensation develops an ulcer, discharge, spreading redness, swelling or colour change;
• there is a sudden snap with inability to push off, stand on tiptoe or move the ankle normally;
• pain is severe and rapidly worsening, or occurs with unexplained weight loss or an enlarging mass.

These features can require assessment for fracture, dislocation, infection, loss of circulation, blood clot, tendon rupture or another time-sensitive condition. For a life-threatening emergency in Singapore, call SCDF 995.^[1]

Why assessment comes before selecting a scan

“Foot pain” can refer to the heel, arch, midfoot, forefoot, toes, skin, nerves or pain referred from elsewhere. “Ankle pain” can arise from bone, cartilage, ligaments, tendons, joints, nerves or inflammatory disease. The first task is to narrow the clinical question.

Assessment aims to establish:

1. whether urgent treatment or imaging is required;
2. whether symptoms are more likely traumatic, mechanical, inflammatory, neurological, vascular or referred;
3. which structures or regions require closer examination;
4. whether a test would provide information that changes management;
5. what the patient needs to achieve and how progress should be measured.

Step 1: The clinical history

How did the symptoms begin?

The clinician may ask whether pain followed a twist, fall, direct impact, sudden push-off, increase in walking or running, change in footwear or no obvious event. Immediate swelling after trauma may suggest a different injury from gradual swelling after prolonged standing.

Where exactly is the pain?

The patient may be asked to point with one finger to the most painful location. Relevant regions include:

• inside or outside of the ankle;
• front or back of the ankle;
• under, behind or at the side of the heel;
• the arch or midfoot;
• the ball of the foot, toes or spaces between the toes;
• a scar, wound, callus or area of altered sensation.

Pain can also spread. Burning into the toes, for example, may raise different questions from sharply localised bone pain.

How does the pain behave?

Helpful details include pain on the first steps in the morning, pain after warming up, pain during push-off, pain on uneven ground, night pain, swelling after activity, catching, locking or repeated giving way. The clinician may ask about walking distance, standing duration, stairs, footwear, work surfaces and sporting demands.

What medical factors matter?

Diabetes, reduced sensation, circulation disease, gout, inflammatory arthritis, osteoporosis, kidney disease, immune suppression and previous surgery can change both the diagnosis and urgency. Medicines such as anticoagulants or prolonged corticosteroids may also be relevant.

What has already been tried?

Previous rest, braces, boots, medication, footwear changes, insoles, traditional treatment, physiotherapy, shockwave therapy, injections and surgery should be reviewed. “It did not work” may mean no pain reduction, no functional improvement, unacceptable side effects, an impractical plan or treatment directed at the wrong diagnosis.

What is the patient trying to achieve?

The assessment should identify whether the priority is comfortable household walking, standing through a work shift, wearing required shoes, travelling, returning to running or avoiding a particular treatment. These goals influence how much diagnostic certainty is needed and what improvement should look like.

Step 2: Observation, skin and circulation

The clinician may inspect both sides for:

• swelling, bruising, redness, scars or deformity;
• arch height and hindfoot or toe alignment while standing;
• calluses and patterns of pressure;
• blisters, ulcers, infection or nail problems;
• temperature or colour differences;
• calf size or muscle wasting.

Where relevant, pulses, capillary refill, skin condition and protective sensation may be checked. A person with diabetes or neuropathy may have a significant pressure injury without proportionate pain.

Step 3: Walking and functional assessment

Observation may include ordinary walking, turning, stairs, a squat, single-leg balance, heel raises, toe walking or hopping. The choice depends on safety and symptom severity.

Function can reveal information not captured by a scan. Examples include:

• avoidance of push-off because of Achilles or forefoot pain;
• poor balance after repeated ankle sprains;
• inability to complete a single-leg heel raise;
• restricted ankle movement during a squat;
• pain that appears only after repeated loading.

A painful movement does not identify one tissue with certainty. It helps build the overall pattern.

Step 4: Movement, strength and palpation

The ankle, hindfoot, midfoot and toes may be moved actively and passively. The clinician may compare upward and downward ankle movement, inversion, eversion, toe extension and joint stiffness.

Strength testing may include the calf, muscles that turn the foot inward or outward, toe flexors and extensors, and muscles supporting the arch. Localised tenderness may be assessed over bones, ligaments, tendons, joints, the plantar fascia and soft-tissue lumps.

Tenderness is useful for localisation but does not prove the diagnosis. A painful area may be sensitised because of overload, referred pain or a nearby condition.

Common clinical tests and what they may mean

Clinical tests are most useful when several findings agree with the history. Self-testing can aggravate an injury and should not delay assessment of warning features.

Ottawa ankle and foot rules after an acute injury

The Ottawa ankle rules are a validated clinical decision aid designed to help determine when radiographs may be appropriate after an acute ankle or midfoot injury.^[2] They consider the location of bone tenderness and the ability to bear weight.

They are not a home diagnostic checklist and do not identify ligament, tendon or cartilage injury. Their applicability may be limited in some circumstances, including altered sensation, communication difficulty, pregnancy or situations outside the population in which the rule was validated. A clinician still considers the injury mechanism, examination and overall risk.

When an X-ray may be considered

X-ray may be considered when:

• a fracture or dislocation is suspected after trauma;
• the Ottawa criteria or other clinical findings support radiography;
• persistent pain raises concern about bone or joint disease;
• arthritis, alignment or deformity needs assessment;
• there is concern about bone damage related to neuropathy or another medical condition.

Weight-bearing views may be particularly informative for alignment, arthritis and some midfoot or forefoot problems because the appearance under load can differ from a non-weight-bearing image.

X-rays are less informative for many tendons, ligaments, nerves and early stress injuries. A normal result must be interpreted against the symptoms and examination.

When ultrasound may be considered

Diagnostic ultrasound may help assess selected superficial structures, including:

• Achilles, peroneal, posterior-tibial and other tendons;
• selected ligament injuries;
• plantar-fascia thickening or disruption;
• bursae, cysts, fluid collections or superficial lumps;
• dynamic tendon movement or snapping;
• guidance for selected procedures.

Ultrasound does not use ionising radiation and allows dynamic assessment. Its usefulness depends on the structure, operator and clinical question. It is less suited to a comprehensive view of deep bone marrow, complex joint surfaces and some cartilage or deep soft-tissue problems.

When MRI may be considered

MRI may be useful when there is concern about:

• an occult or stress fracture not shown adequately on initial X-rays;
• osteochondral or cartilage injury;
• a significant tendon or ligament injury;
• persistent pain after an ankle sprain with an uncertain diagnosis;
• infection, inflammatory disease or a soft-tissue mass;
• complex pain where the result is likely to alter a procedure or surgical plan.

For chronic foot and ankle pain, professional imaging guidance generally begins with radiographs and then selects MRI, ultrasound, CT or another test according to the suspected condition.^[3][4]

MRI can reveal abnormalities that are not responsible for symptoms. The location and severity of a finding should be compared with the clinical pattern rather than treated automatically.

When CT may be considered

CT provides detailed bone information and may be considered for complex fractures, joint surfaces, subtle bony abnormalities, healing assessment or surgical planning. Weight-bearing CT may be useful in selected alignment and joint-loading questions where available.

CT uses ionising radiation and generally provides less soft-tissue contrast than MRI. It should be selected when the additional bone detail is likely to affect care.

When blood tests or joint-fluid analysis may be considered

Blood tests may be relevant when the history or examination suggests infection, gout, inflammatory arthritis or another systemic condition. Tests can include inflammatory markers, blood counts, urate or condition-specific investigations.

A blood urate result alone does not always confirm or exclude gout during an acute episode. Joint aspiration may be considered when the diagnosis is uncertain or infection must be excluded. A hot swollen joint with fever or serious illness requires prompt medical attention.^[5]

When nerve or circulation tests may be considered

Nerve-conduction studies and electromyography may be considered for persistent numbness, weakness or uncertainty between local nerve entrapment, peripheral neuropathy and a nerve problem arising from the back. They answer different questions from MRI.

Vascular studies may be needed when pulses, skin temperature, colour, healing or exertional symptoms suggest impaired circulation. Sudden loss of circulation is an emergency.

Patient-specific assessment pathways

“I twisted my ankle yesterday and cannot walk properly”

The immediate examination focuses on deformity, bone tenderness, weight bearing, swelling, circulation and nerve function. X-ray may be appropriate. Stress testing should be proportionate to pain and should not delay care for a possible fracture or dislocation.

“My ankle sprain still hurts after six weeks”

Reassessment may examine ligament stability, tendons, cartilage-related symptoms, strength, balance and gait. Repeat radiographs, ultrasound or MRI may be considered if the result is likely to identify an overlooked injury or change treatment.

“My heel hurts on the first steps every morning”

The clinician may assess plantar heel tenderness, ankle mobility, calf capacity, footwear and recent load changes. Imaging may not be required for a typical presentation, but it becomes more relevant if symptoms are atypical, severe, persistent or associated with neurological or systemic features.

“I felt a snap behind my ankle”

Achilles continuity and push-off function should be assessed promptly. The Thompson test and imaging may contribute, but a partial injury can require a different interpretation from a complete rupture.

“The X-ray is normal but the foot still hurts”

The location and timing of pain should be reviewed. Early stress injury, tendon or ligament damage, cartilage problems, nerve pain and some joint conditions may not be visible on routine X-rays. The next test should follow the suspected diagnosis.

“I have diabetes and a new sore under my foot”

Skin depth, infection, circulation, sensation, footwear pressure and possible bone involvement require assessment. Pain severity is not a reliable indicator when protective sensation is reduced.

“I need to return to standing work next week”

The assessment should define what is safe, whether support or temporary duty modification is required, and which functional measures will guide progression. A scan is useful only if it changes that plan; urgency alone does not make every imaging test appropriate.

Questions to ask before having a test

1. What diagnosis or structure is the test intended to evaluate?
2. Why is this test preferred over X-ray, ultrasound, MRI or CT?
3. Will the result change treatment or referral?
4. What could the test miss?
5. Does it involve radiation, contrast, needles or other risks?
6. What happens if the result is normal or shows an incidental abnormality?

How The Pain Relief Clinic may help

A licensed medical doctor can review the symptom pattern, warning signs, previous treatment and functional requirements; perform a focused examination; and discuss whether imaging, medication, physiotherapy, a procedure or external referral may be appropriate.

The Pain Relief Clinic has in-house physiotherapists who can work with the licensed medical doctor for integrated management. This can help align the working diagnosis, symptom-control measures, progressive loading, footwear or activity planning and review of functional progress.

Physiotherapists practising in Singapore should be appropriately registered.^[6]

Insurance referrals and supporting paperwork

The clinic can assist with clinically appropriate referrals and supporting paperwork for insurance claims. Coverage, required documents, pre-authorisation and reimbursement depend on the patient’s policy and insurer. A referral, form or medical report does not guarantee approval or payment.

Before arranging imaging or physiotherapy, patients may wish to check whether their policy requires a doctor’s referral, panel provider, pre-authorisation, itemised invoice or medical report.

Frequently asked questions

Do all ankle injuries need an X-ray?

No. The mechanism, weight-bearing ability and location of bone tenderness help determine whether radiography is appropriate. A clinical decision rule can support this choice, but individual circumstances still matter.

Can an X-ray show ligament or tendon damage?

Routine X-rays primarily show bones and alignment. They may show indirect clues but do not fully assess most ligaments and tendons. Ultrasound or MRI may be considered if soft-tissue findings would change care.

Is ultrasound or MRI better for Achilles pain?

Neither is universally better. Ultrasound offers dynamic assessment of a superficial tendon, while MRI gives a broader view of bone, joints and soft tissues. Many typical cases are assessed clinically without immediate imaging.

Does a normal MRI mean nothing is wrong?

No. A scan may not explain load tolerance, balance, weakness, sensitivity, footwear pressure or every source of pain. The result should be interpreted with the examination and functional pattern.

Can MRI tell whether I need surgery?

MRI can define selected structural problems but does not determine surgery by itself. Symptoms, examination, functional loss, previous care, health and the likely benefits and burdens of surgery also matter.

Should I request a scan because treatment has not worked?

Persistent symptoms justify reassessment. Imaging may be useful if an alternative diagnosis is suspected or the result could change the next step. Repeating treatment without reassessing the diagnosis is not the only option.

Arrange a foot and ankle pain assessment in Singapore

If foot or ankle pain is affecting walking, standing, work, sleep or exercise—or previous care has not provided sufficient progress—a consultation can assess the likely cause and whether imaging or another test may be useful.

The Pain Relief Clinic
350 Orchard Road, #10-00 Shaw House
Singapore 238868
Telephone: +65 9068 9605

Not every investigation or treatment discussed on this page is required, offered or recommended by the clinic. Availability and permissible use of tests, medicines, devices, injections and emerging treatments in Singapore may change with evolving Ministry of Health, Health Sciences Authority and Singapore Medical Council requirements. Individual decisions require clinical assessment and should follow current Singapore regulations and professional guidance.

References

1. Singapore Civil Defence Force. Emergency Medical Services.
2. Stiell IG, et al. Implementation of the Ottawa ankle rules. JAMA. 1994.
3. American College of Radiology. ACR Appropriateness Criteria: Chronic Foot Pain.
4. American College of Radiology. ACR Appropriateness Criteria: Chronic Ankle Pain.
5. National Institute for Health and Care Excellence. Gout: diagnosis and management. NICE Guideline NG219.
6. Allied Health Professions Council Singapore. Search the register.

Disclaimer: This information is provided for general reference only and should be used in consultation with your licensed medical doctor. It is not a diagnosis or a substitute for personalised medical advice. Seek urgent care for severe, rapidly worsening or warning-feature symptoms.

Reviewed by Dr Terence Tan — 13 September 2026