Achilles Tendinitis
Achilles tendinitis (also called Achilles tendinopathy or "Achilles pain") causes a burning pain at the back of the ankle, just above the heel, and is a common injury in runners and other athletes who play sports that require lots of starting and stopping, such as tennis.

The Achilles tendon is the largest tendon in the body. It joins the gastrocnemius (calf) and the soleus muscles of the lower leg to the heel of the foot. Tendons are very strong, but not very flexible, and the Achilles tendon is no exception. This means that the Achilles tendon can only stretch so far before it becomes inflamed and even tears.

A doctor can diagnose Achilles tendonitis by asking you questions about your symptoms and examining your foot and lower leg. Sometimes, an imaging test like an MRI is needed if your doctor is worried about a tear.

The good news is that if you are diagnosed with Achilles tendinitis, simple, home remedies like rest, ice, and taking an over-the-counter anti-inflammatory medication are usually sufficient to treat it. Although, if the pain is severe or persists, physical therapy may be needed. Keep in mind, if the tendon does not heal well, it's susceptible to tearing (called an Achilles tendon rupture), and this requires surgical repair.