Red bumps on the waist may be related to herpes zoster, urticaria, insect bite dermatitis and other diseases, which can be improved by general treatment and medication. 1. Herpes zoster: If there are red bumps on the waist caused by herpes zoster, patients should wear loose clothing and avoid rubbing the affected area. You can take antiviral drugs such as acyclovir and famciclovir, which have the effect of inhibiting viral replication. 2. Urticaria: red bumps on the waist are considered to be related to urticaria, patients should actively search for the causative factors and avoid re-exposure. You can take antihistamines such as ebastine and loratadine orally, which have the effect of relieving itching. 3. Insect bite dermatitis: insect bite dermatitis may also lead to red bumps on the waist, the patient can use soapy water to wash the affected area, at the same time to avoid scratching the affected area, so as not to cause secondary infection. You can use topical hydrocortisone, dexamethasone and other glucocorticosteroids to play an anti-inflammatory, anti-itch effect; if the itching is intolerable, you can take oral cetirizine, loratadine and other antihistamine drugs. If red bumps appear on the waist, you should go to the regular hospital for examination and treatment under the guidance of the doctor. Drugs need to be used in accordance with medical advice.