The most common causes of buttock tendon pain are sciatica, lumbar intervertebral disc herniation, osteophytes, sacroiliac arthritis, etc. If the symptoms persist, it is recommended to seek medical treatment in time. 1. Sciatica: when the sciatic nerve is compressed, there will be obvious irritating pain symptoms, the main parts of the pain are the waist, buttocks and the back of the thighs, due to the lumbar disc herniation or other causes of sciatic nerve compression, it is prone to buttock tendon pain. 2. Herniated lumbar discs: Lumbar discs undergo degenerative changes with age, and the compression of the nerves will cause pain and numbness in the lumbar region as well as the buttocks, which may be manifested as pain in the buttocks. 3. Osteomalacia: When osteophytes occur in the lumbosacral bones, the increased bone mass will irritate the surrounding soft tissues, which will easily cause the manifestation of buttock tendon pain. 4. Sacroiliac arthritis: when inflammation occurs in the sacroiliac joints, it will irritate the surrounding soft tissues as well as nerves, which may lead to the manifestation of buttock tendon pain. There are many causes of buttock pain, which may be related to trauma, osteoarthritis, bone fracture, muscle strain and other diseases. If the symptoms continue to be unrelieved, it is recommended to go to the hospital in time to find out the cause of the disease, and carry out targeted treatment.