What is the ankle?
The ankle joint is primarily made up of the joint between the tibia, fibula, and talus. The bones form a fork around the talus, allowing the foot to bend up and down.
Beneath the upper ankle are joints that help the foot to twist and adapt to uneven surfaces. Ligaments on the outside and inside limit movements that would otherwise make the joint unstable.
Discomfort after twisting or overexertion is often described as ankle injury, but exact tissue may vary.
Anatomy and stress of the ankle joint
When walking, the body rolls over the foot while the calf muscles and tendons control the movement. The Achilles tendon is central to the push-off, while tendons on the outside and inside help to keep the foot stable.
Articular cartilage distributes the load across the joint surfaces. Previous fractures or repeated sprains can change the mechanics and eventually contribute to stiffness, instability or osteoarthritis.
Balance and neuromuscular control are important. After a sprain, strength and balance training can reduce the risk of new injuries.
Common causes of ankle pain
A sprain is a stretching or damage to a ligament. It often causes pain, swelling and sometimes bruising. A fracture can cause similar symptoms but often makes it more difficult to bear weight.
Other causes include tendon irritation, cartilage damage, osteoarthritis, impingement, skeletal stress reaction, or inflammation. Pain without obvious trauma can also be due to changed load, shoes, or exercise.
Pain in the back of the heel may be related to the Achilles tendon. Read more about Achilles tendon rupture in case of sudden loss of power or feeling of a bang.
When should you seek care for your ankle?
Seek care after trauma if the ankle is misaligned, if you cannot bear weight at all, if the pain is very severe, or if sensation and circulation seem affected.
Planned assessment is appropriate if the swelling does not decrease, if the ankle continues to give way, if you have clear locking, or if the stress pain persists despite adapted activity.
A red, warm and severely swollen joint along with fever or general ill health needs to be assessed quickly because infection or other acute inflammation must be ruled out.
Seek immediate medical attention if there is poor posture, inability to bear weight, pronounced sensory impairment, cold or discolored foot, or rapidly increasing pain and swelling.
How are ankle problems investigated?
The healthcare provider will ask how the injury occurred, where the pain is located, and whether you can walk. The ankle will be examined for swelling, tenderness, stability, mobility, circulation, and nerve function.
X-ray is the first-line examination for suspected fractures. Ultrasound can sometimes be used for tendons and superficial structures. In cases of long-term problems, load analysis and physiotherapeutic assessment may be important.
Imaging diagnostics are chosen based on the structure suspected. An examination that is suitable for the skeleton may not be best for ligaments or cartilage.
When might an ankle MRI be relevant?
MRI ankle may be relevant in cases of suspected ligament or tendon injury, cartilage damage, stress reaction, bone marrow changes or when the pain persists even though a regular X-ray does not explain the symptoms.
MRI is rarely necessary for an uncomplicated sprain that is improving as expected. The study should be used when the results may affect treatment or further investigation.
Clear imaging findings must also be assessed along with function and symptoms. Rehabilitation and gradual return to weight-bearing are often an important part of treatment.
Recovery and prevention after ankle injury
After an uncomplicated sprain, early, appropriate loading is usually better than prolonged total rest. Loading is increased gradually based on pain, swelling, and the ability to walk without a noticeable limp. Bracing or taping may be used for a period, but should be combined with exercises that restore strength and control.
Balance exercises are especially important because ligament injuries can affect the joint's sense of position. If the ankle continues to give way, the risk of new sprains may increase. Training may therefore include single-leg standing, controlled toe raises and gradually more demanding movements.
Return to running or sports should not be solely determined by time. The ability to jump, land, change direction, and bear weight without increasing pain or swelling provides better guidance. If instability persists, a physical therapist or orthopedic assessment may be needed.
If the symptoms persist despite rehabilitation, other causes than a simple ligament injury need to be considered, such as cartilage damage, tendon damage, impingement or hidden fracture. In this case, targeted imaging diagnostics can help, but the answer still needs to be linked to function and load.