Dercum's Disease
Dercum's disease is a rare disease in which you develop growths of fatty tissue called lipomas just under your skin. When these growths press against your nerves, the pain can very severe.
Common symptoms of Dercum's are weight gain that is unrelated to diet or exercise, strange accumulations of fat that have an abnormal consistency, feelings of extreme tiredness and pain to the touch in the affected areas. This disease occurs more often in women than in men.
There are no specific tests for diagnosing Dercum's disease. If you have symptoms, you should see your doctor or a pain specialist to help control your pain.