A circle of red bumps on the waist is itchy and may be caused by insect bites. In case the local skin is not broken, the patient can first use soap and water, saline and other cleaning or wet compresses, or use insect bite cream to relieve the itching symptoms. If the symptoms are not relieved for a long time, you can follow medical advice to use some drugs for treatment. In addition, the symptoms that cause itching red bumps on the waist clinically, but also commonly in the following diseases: 1, scabies: red bumps itching symptoms are more intense, and tunnel-like lesions on the waist, may be due to scabies infection. Scabies is a contagious disease that can be spread by direct contact with the patient, or indirect contact with the patient’s clothing, towels, etc. Patients who have been clearly diagnosed with scabies need to be treated in isolation, and at present the clinical treatment is mainly based on medication, and sulfur ointment, salicylic acid ointment, etc., can be used as prescribed by the doctor to coat the local damaged parts, and if necessary, the whole body can also be coated; 2. Herpes zoster: when the body’s immunity is too low, it may lead to an increase in the activity of the herpes zoster virus, which may lead to viral infection. It generally manifests itself as lesions along the nerve alignment, which may appear as bead-like red bumps accompanied by itching and painful symptoms, and may also occur on the lower back. Herpes zoster is a self-healing disease and may be relieved by the use of a stovepipe wash to relieve itching. Patients with more serious symptoms can also follow medical advice to use topical acyclovir cream, ganciclovir gel and other antiviral ointments to promote disease healing; 3. Allergic reactions: allergic patients may develop a circle of red bumps on the waist after exposure to allergens, and accompanied by significant itching symptoms. Anti-allergy drugs such as loratadine and paracetamol can be taken as prescribed by the doctor for treatment. It is recommended that allergic patients go to the hospital as soon as possible to improve allergen testing to avoid inducing allergic reactions again.