Small particles on the sides of the face when touched may be due to acne, folliculitis, milia and other diseases. 1. Acne: It is usually caused by excessive secretion of sebaceous glands and elevated levels of androgens, and it is also related to dietary habits, high temperature environments, and medications. Patients often appear in the cheeks, forehead and jaw pimples, papules, pustules, etc., which can also be manifested as small particles on both sides of the face. Some patients can also be accompanied by rash overflow and so on. 2. Folliculitis: usually due to pathogen infection, and also with hair pulling, skin trauma, sweating, wearing tight clothes and other factors. Folliculitis can also be induced by decreased immunity, long-term topical glucocorticoid ointment, obesity, sedentary and other conditions. Patients will often appear in the hair follicle as the center of the red papules or pustules, which will be manifested as the sides of the face feel small particles. Some patients can also be accompanied by itching, pain and other symptoms. 3. Corns: Usually, primary corns are related to heredity, while secondary corns are related to damaged sweat ducts and skin damage. Patients often appear yellowish-white hard small papules, mostly on the face, patients usually have no self-conscious symptoms. Some patients may also have small granules on both sides of the face. In addition to the above, small particles on both sides of the face may also be caused by fat grain, flat warts, sweat duct tumor and other conditions. It is recommended that patients pay more attention to facial cleanliness, and if there are small particles on both sides of the face, it is necessary to find out the cause of the disease and treat it in time.