An enthesis is the medical term for bone insertions of certain structures such as tendons, joint capsules, or ligaments. So an enthesopathy is a disorder of the entheses, mostly appearing as an inflammation: this is called enthesitis. Enthesitis may be due to trauma, but can also occur in the course of the development of chronic inflammatory diseases such as ankylosing spondylitis or psoriatic arthritis. This inflammation is responsible for pain in the affected area. The treatment is based on resting the affected limb, the use of analgesics or anti-inflammatory drugs, and treatment of the underlying disease in cases of chronic inflammatory arthritis.