Millet grains on the face are mainly considered to be related to folliculitis, acne, milia, contact dermatitis and so on. 1. Folliculitis: mainly caused by hair follicles infected with pathogens, which can lead to the appearance of red milia-like papules on the affected area, accompanied by redness, swelling, fever, pain and other symptoms. 2. Acne: mainly related to endocrine factors, bacterial infections, etc., which can lead to the appearance of red papules on the patient’s face, which have no openings in the early stage and look like small rice grains. 3. Corns: tiny cysts formed due to retention of epithelial keratinized material in the ducts of skin appendages, often manifested as yellowish-white, firm papules on the face. It can also cause milia on the face. 4. Contact dermatitis: After contact with allergens or irritants on the face, an allergic or irritant reaction may occur, resulting in the appearance of small milia-like pimples, accompanied by itching, redness and swelling and other symptoms. If the above symptoms occur, it is recommended to consult a doctor to confirm the diagnosis and follow the doctor’s instructions for treatment.