Pain

Pain occurs in a wide range of forms in ME/CFS. These include abdominal pain, allodynia, arthralgia, chest pain, chronic pain, headache, heartburn, migraine, myalgia, sciatica, sinus headaches and vein pain.

Pain can also occur as a consequence of common comorbid illnesses such as endometriosis, Sjogren's syndrome, IBS or fibromyalgia.