Ankylosing Spondilitis is a condition related to rheumatoid arthritis, but mainly affects the low back and spine (ie ‘spondilitis’). The joints are also affected.

What is common in Ankylosing Spondilitis os pain at the insertion of teh achilles tendon and the plantar fascia, giving rise to posterior and plantar heel pain. These are part of the disease process of the condition which is known as enthesitis (an inflammation of the insertion of ligaments and tendons onto bone.

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