A small white spot on the lower eyelid may be caused by acne or fat grain on the surface of the skin, blepharoplasty cysts or granuloma. 1. Prolonged use of cosmetics or overproduction of sebaceous glands can lead to acne or fat grains on the skin. You should reduce the use of cosmetics and pay attention to cleaning the skin. 2. Blepharoplast cysts are caused by blocked secretion or excessive secretion of the blepharoplast glands and appear as localized lumps without redness, swelling or pain, which can be accelerated and absorbed by hot compresses and massages. 3. Purulent infection caused by infected blepharoplasty glands will have localized redness, swelling, pain and other inflammatory manifestations. There are many reasons for white spots on the eyelid skin, and if they do not dissipate after a certain period of observation, it is recommended that they go to a dermatologist or ophthalmologist to improve the slit-lamp microscope and other ancillary tests to determine the cause of the disease, and then to be treated accordingly.