These are usually brown rough raised growths that often appear on the trunk but can also show up on other body areas. There is no acceptable over-the-counter product or prescription medication that dermatologists feel will effectively remove them. Liquid nitrogen is the best treatment. Surgical shave removal is also useful for larger lesions.
It is important that seborrheic keratoses be distinguished from actinic keratoses which are pre-skin cancers caused by sunlight. Since Medicare will pay for an office visit with a dermatologist, I feel that this is a case where you should have a skin specialist examine them and give you an opinion about the best treatment and what is covered by your insurance.