Red like pimples on the face but not painful or itchy, may be caused by folliculitis, acne, urticaria and other factors. 1. Folliculitis: If patients usually do not pay attention to facial hygiene, it will lead to bacterial growth, which will stimulate a single pore or multiple pores, which will make the local inflammatory reaction, the lesions at first red follicular papules, pustules in the center within a few days, surrounded by a red halo, usually in the first onset of the pimples will appear painless and itchy. 2. Acne: If the patient is often under too much stress or long-term depression, it will lead to endocrine disorders, which will disrupt the level of androgens in the body, which may cause the sebaceous glands to secrete a large amount of oil, which will lead to acne when it clogs the pores. Acne is painless and itchy at the onset. 3. Hives: If the patient’s face is exposed to allergens, such as pollen, animal dander, dust, etc., it will stimulate the body’s immune response, resulting in hives. Due to the onset of the patient’s face may appear red papules, and will not appear painful and itchy, but with the aggravation of the disease, local itching, followed by the emergence of red red masses. After the disease, patients should not scratch with their hands, so as not to cause infection. It is recommended that patients consult a doctor in time to find out the cause, and strictly follow the doctor’s instructions to use medication, do not blindly use drugs.