Dense small particles around the eyes may be caused by factors such as cornu rashes, sweat duct tumors, and contact dermatitis. 1. Corns: usually due to genetic, skin diseases and other factors, the appearance of dense small particles around the eyes, may be due to local hair follicle blockage, resulting in abnormal sebum secretion formed. 2. Sweat duct tumor: it may be caused by heredity, endocrine disorders and other factors. Sweat duct tumor will not dissipate on its own, with the growth of age, it may appear in the eye area, neck and other parts of the body, and even gradually increase, with the removal of the demand for medical treatment, such as choosing laser treatment. 3. Contact dermatitis: when the skin around the eyes is exposed to cosmetics and other allergic reactions, there can also be dense small particles, which need to stay away from allergens, and if necessary, follow the doctor’s instructions to take oral loratadine and other anti-allergy treatments. When there are dense small particles around the eyes, accompanied by discomfort, you should go to the hospital for examination in a timely manner, to clarify the cause of the disease, and then follow the doctor’s instructions to deal with.