How large are the spots? Are they round? Or kind of ovoid?
It sounds like what you have may be xanthalasma. They are lipid deposits on your eyelids. They are usually found on upper lids and are more often than not on both upper lids. They are benign and can be surgically removed; however, then will tend to recur. In a young patient, I usually recommend checking a lipid profile to see if your lipid or cholesterol is high.
Hope this helps.