Red, swollen and closed pimples are a symptomatic manifestation of acne and can be treated through thorough cleansing, medication, physical therapy and dietary improvements. 1. Thorough cleansing: When the skin appears red, swollen and closed mouth pimples, it is recommended to use saline or iodine to disinfect and sterilize the skin, and you can also brush with acid such as salicylic acid and fruit acid to remove the aging keratin and discharge the pore oil, so as to improve the symptom of red, swollen and closed mouth pimples. 2. Medication: you can use topical adapalene gel, fusidic acid cream and other drugs, if necessary, can be combined with oral isotretinoin, minocycline and other drugs. 3. Physical therapy: When the acne area is large, you can also consider red and blue light irradiation therapy, which can effectively relieve the inflammatory reaction and promote the acne to subside. 4. Improve diet: In daily life, we should pay attention to maintain good dietary habits such as regular work and rest, avoid eating greasy, spicy, stimulating food, drink more water, eat more fruits and vegetables. Skin redness and swelling of acne is recommended to go to the hospital, under the guidance of the doctor to use medication, do not self-medication.