A lot of small particles on the face may be the result of chestnut papules, acne, flat warts and pimples. 1. Corns: the disease is a kind of retention cyst, which mainly occurs on the face, and most of them are caused with family genetic history, trauma, and subepidermal herpetic dermatosis, etc., resulting in a lot of small particles on the patient’s face. 2. Acne: The disease may be related to androgen levels, heredity, and Propionibacterium acnes reproduction, etc. When the hair follicles on the skin are blocked, it will lead to a lot of small particles on the face. 3. Flat warts: a lot of small particles on the face may be caused by flat warts, which are caused by the human papilloma virus infecting the skin mucous membranes, resulting in a lot of small particles on the face in the form of round or irregular polygonal shapes, usually with no self-awareness of the symptoms, and occasional mild itching. 4. Acne: usually associated with dietary factors, follicular sebaceous gland duct keratinization abnormalities, androgens and sebum secretion increased due to induce a lot of small particles on the face. If the symptoms are more serious, you need to go to the hospital in a timely manner, under the diagnosis of the doctor, to take targeted treatment, life should pay attention to facial cleanliness, maintain a good work and rest and reasonable dietary habits.