Red, swollen, hard bumps on the face may be caused by insect bite dermatitis, folliculitis, acne and other diseases, which can be treated with oral medication and medication application. 1. Insect bite dermatitis: it is a kind of dermatitis caused by mosquito bites, which will lead to localized pimples, bumps, swelling and other symptoms, which will lead to red and swollen bumps on the patient’s face. You can apply glycerine lotion, mupirocin ointment and other medications. 2. Folliculitis: It is a common inflammatory skin disease of hair follicles, which can lead to red pimples, redness and swelling around the hair follicles, which will lead to red and swollen hard bumps on the face. It can be treated with antibiotics such as topical mupirocin. 3. Acne: Mainly found in teenagers, the disease can lead to the appearance of pimples and nodules on the face, which will lead to the appearance of red, swollen and hard bumps on the face. You can apply mupirocin, azelaic acid and other drugs to treat it. There may be other reasons for the red and swollen bumps on the face, so you need to go to the regular hospital in time to clarify the cause of the disease through the appropriate examination, and use medication under the guidance of the doctor.