Check your cholesterol. Cryotherapy, lasers, and chemical cauterization are the modes of therapy.
Xanthalesma / Xanthomas are deposits of fat/cholesterol in the eye lid. Possible causes are raised cholesterol, 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.