Pain

It is a common occurrence marked by widespread pain that can affect as many as 1 in 25 people. It affects women more frequently than men.

Migraine is a complex syndrome that usually involves severe headaches and may be associated with gastrointestinal symptoms.

Sports injuries may affect muscles, bones, ligaments, tendons, joints, and cartilage. They are caused by recurrent strain on a particular body part or by sudden shocks, unnatural, abrupt movements, and inadequate warmup.

It used to be treated as "wear and tear« of the bones/cartilage of synovial joints, however nowadays it is classified as a metabolically active process involving the entire joint: cartilage, bones, capsules, muscles and mucous membranes of the joint.