<unk>  (also with the nonmedical spelling<unk>   is a painful disorder of a tendon.  Generally<unk>  is referred to by the body part involved, such as Achilles<unk>  (affecting the Achilles tendon), or patellar<unk>  (jumper's knee, affecting the patellar tendon). It was believed that<unk>  was due to inflammation of a tendon, although this is coming into doubt. Chronic overuse of tendons leads to microscopic tears within the collagen matrix, which gradually weakens the tissue.
Tendinitis
Sacroiliitis
Osteochondritis
Plantar fasciitis
Shoulder arthritis
Synarthrosis
Tendinopathy
Sciatica