Heel tendon pain may be caused by trauma, Achilles tendonitis, infection, lumbar disc herniation and other diseases. 1. Trauma: Most of the Achilles tendon injuries are caused by trauma such as running and jumping, and in serious cases, Achilles tendon can be torn, causing heel tendon pain. 2. Achilles tendonitis: aseptic inflammation of the heel tendon due to long-term exercise, wear and tear, etc., which can cause heel pain. 3. Infection: due to bacterial, fungal and other pathogens infecting the ankle, such as dengue in the lower limbs, tendon pain at the back of the heel can occur. 4. Lumbar disc herniation: heel pain can occur due to nerve root compression caused by herniated lumbar discs, misalignment of small joints and other changes. Heel pain may also have other causes, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.