Fibromyalgia

Fibromyalgia, also called fibromyalgia syndrome (FMS), is a long-term condition that causes pain all over the body. As well as widespread pain, people with fibromyalgia may also have increased sensitivity to pain, extreme tiredness (fatigue), muscle stiffness, difficulty sleeping, problems with mental processes (known as "fibro-fog"), such as problems with memory and concentration, headaches and irritable bowel syndrome (IBS) (a digestive condition that causes stomach pain and bloating). Although there's currently no cure for fibromyalgia, there are treatments to help relieve some of the symptoms and make the condition easier to live with.

Source: NHS