, hyperlipidaemia states, diabetes mellitus and obesity.
They cause no harm, but can increase in size producing cosmetic blemish. The only treatment is removal by surgery with/without skin grafting (depending on the size of the lesion) or use of laser (CO2 Laser).
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.