There is a disease called Dercum's disease that is characterized by multiple
painfulPainful menstrual periods lipomasLipoma - arm. Not sure if this describes your husband's conditions, but it sounds like it. It has been associated with
weaknessWeakness, fatigue, emotional and
cognitiveMental status tests changes in some cases, but fortunately there is no known association with other neurological signs/symptoms. Treatment is usually targeted towards pain relief rather than removal. Lidocaine ( a local anesthetic) can sometimes be helpful for very painful ones. There is a support group for patients and families with dercum's disease. However, I do not have any information on this. Perhaps you can try the internet.
In the case that this is not dercum's disease, lipomas themselves are not cancerous and do not necessitate surgical removal. There is a disease called liposarcomas which are fatty
malignant tumors, but you will have to see an internist or dermatologist for futher evaluation. The best kind of doctor for your husband is a derm surgeon. Good luck