The face is not smooth with small particles may be caused by physiological factors, may also be acne, folliculitis, eczema and other skin diseases. 1. Physiological factors: not pay attention to clean, do not pay attention to skin care, etc. may lead to damage to the facial skin barrier, resulting in a rough face with small particles, fat particles around the eyes easy to grow will also be manifested in the face is not smooth with small particles, usually without treatment. 2. Acne: Acne is a common chronic inflammatory disease of the sebaceous glands of the hair follicles, mainly caused by follicle blockage, mostly occurring in the facial area, can be manifested as pimples, nodules, inflammatory papules, pustules and other symptoms, appearing on the face of the skin is not smooth with the phenomenon of small particles. 3. Folliculitis: folliculitis is a common inflammatory skin disease of the hair follicle, mainly caused by bacterial, fungal and other pathogens infected hair follicles, often manifested as red papules around the hair follicle, accompanied by itching, pain, redness and other discomforts, occurring in the head and face, neck and other parts. 4. Eczema: Eczema is caused by a variety of internal and external factors in the superficial dermis and epidermal inflammation, can occur in the face, manifested as the appearance of pinhead to corn size pimples, pimples, and so on, when serious, small blisters can appear, accompanied by itching. If the face is not smooth with small particles, it is recommended to exclude physiological factors and then consult a doctor to clarify the cause of the disease and then carry out targeted treatment.