I'm nor sure what exactly you think when saying small bugs, but I assume you are talking either about swelling of your eyelids or about yellow growths located at both upper and lower eyelids, known as xanthelasma.
Xanthelasma are deposits high in fat, and occur mostly in people with high cholesterol levels.
If you are concerned about high cholesterol levels, it is good to get checked for your thyroid gland function, kidney function, diabetes, since these condition can be associated with abnormal cholesterol levels and obvious eyelids swelling.
Best wishes!
Marija