Red bumps on the right side of the waist itch without pain may be eczema, insect bite dermatitis, contact dermatitis and other causes, usually using medication. 1. Eczema: the occurrence of eczema is caused by the stimulation of a variety of factors inside and outside the body. Local topical glucocorticoid ointment, such as dexamethasone cream, Hasinide cream, etc., can also be used externally with calcium-modulated neural phosphatase inhibitors, such as tacrolimus ointment, pimecrolimus ointment, etc., if the patient itching is serious, oral antihistamines, such as dicloxacortin tablets. 2. Insect bite dermatitis: insect bite dermatitis is mainly related to insect bites. Local topical glycerine lotion, cool oil, etc. to relieve itching, if the itching symptoms are serious, local topical halomethasone ointment, mometasone furoate cream, etc., and at the same time, combined with the application of oral drugs, such as dicloxacort, levocetirizine, etc.. 3. Contact dermatitis: the occurrence of inflammatory reactions due to the contact of the waist skin with certain sensitizing or irritating substances. First of all, we need to find the causative factors and avoid re-exposure, and then symptomatic treatment, such as external zinc oxide ointment, mometasone furoate ointment and so on, combined with oral chlorpheniramine maleate and other drugs. The above drugs have adverse reactions, not blindly self-medication, it is recommended to use under the guidance of a doctor. Red bumps on the right side of the waist itch without pain may also have other causes, it is recommended to go to the hospital in a timely manner, by the doctor according to the characteristics of the medical history and examination results to clarify the cause of the disease, and then give targeted treatment.