There are many reasons for itchy skin on the waist, such as contact dermatitis, eczema, ringworm and early symptoms of shingles. 1. Contact dermatitis: when the skin on the waist comes into contact with sensitizing or irritating substances, it will cause allergic or irritating reactions, resulting in itchy skin on the waist. 2. Eczema: internal and external stimulation of a variety of factors causing inflammatory skin reactions, acute eczema will cause skin erythema, oozing, itching and other symptoms, chronic eczema will cause skin dryness, mossy changes, itching and other manifestations, so it may lead to itchy skin on the waist. 3. Ringworm: fungal infection caused by ringworm of the lumbar skin can also cause itchy lumbar skin. 4. Early symptoms of herpes zoster: due to infection with chickenpox – herpes zoster virus, in the early stages of the disease is often manifested as localized skin itching, burning sensation, pain, followed by a rash. It can also cause itchy skin on the waist. Itchy skin on the waist, there may be other reasons, you need to go to the hospital in time to check, follow the doctor’s instructions for treatment.