<unk>  is classed as a disorder of pain processing due to abnormalities in how pain signals are processed in the central nervous system. The International Classification of Diseases (ICD-11) lists<unk>  as a included in the category of "Chronic widespread pain", code MG30.01.
Fibromyalgia
Osteoarthritis
Polymyalgia rheumatica
Rheumatoid arthritis
Complex regional pain syndrome
Myofascial pain syndrome
Thyroid disease
Calpainopathy