Small dots under the eyes are usually caused by milia, sweat duct tumors, and blockage of the opening of the blepharoplasty glands. Blepharoplakia occurs in children and adolescents. It is caused by thick secretions that block the opening of the blepharoplakia due to the high secretion of the blepharoplakia glands and too little washing of the face in normal times. Small dots are formed on the eyelid margins, which can be eliminated by applying warm towels. Corns are formed when the sebaceous glands of the eye skin are blocked by hyperplastic epithelial cells, resulting in the accumulation of sebaceous secretions, which can be removed by laser. Sweat duct tumors are caused by the abnormal growth of sweat gland duct epithelium in the eyelid area, which can also be removed by laser treatment. The patient should go to the ophthalmology department of the hospital in time to find out the cause of the symptoms, and then the doctor will take targeted treatment.