Pimples are generally referred to as acne. Red and swollen pimples can be treated with creams such as retinoic acid cream, benzoyl peroxide gel and azelaic acid cream. 1. Vitamin A Acid Cream: It can prevent and eliminate acne lesions by regulating the abnormal process of epithelial keratinization of the sebaceous glands of hair follicles and removing the keratin plugs, which is suitable for acne vulgaris, especially blackheads and pimples lesions and other diseases. After use, it may cause skin irritation such as burning, flaking, etc. It is contraindicated for women in the first trimester of pregnancy, those who are allergic to the product, and patients with eczema-like skin diseases. 2. Benzoyl peroxide gel: this product is an oxidizing agent, applied externally to the skin lesions, can kill Propionibacterium acnes, suitable for usual acne, may cause contact dermatitis, allergic to the product, skin with acute diseases and breakouts are prohibited. 3. Azelaic acid cream: the main ingredient is azelaic acid, azelaic acid can inhibit the protein synthesis of microorganisms, Propionibacterium acnes and Staphylococcus epidermidis has antibacterial activity, for mild and moderate inflammation of acne vulgaris, after the use of the drug, local itching, tingling and other adverse reactions, allergic to the components of the product is prohibited. All of the above drugs should be used under the guidance of a doctor, to avoid blind use of medication or stopping medication privately, so as not to cause discomfort.