Itchy skin without bumps is mostly considered as pruritus, which is related to dry skin, lesions of internal organs or psychosomatic diseases. 1. Dry skin: If the skin of the body has the problem of sebaceous gland atrophy, or the skin is dehydrated, it will also lead to dry skin, so it will also trigger the phenomenon of itchy skin without bumps. 2. Diseases of internal organs: If there are tumors in internal organs or problems such as diabetes and chronic renal insufficiency, it is easy to cause itchy skin without bumps. 3. Mental and psychological illnesses: some patients with depression or anxiety disorders are prone to itchy skin and physical symptoms, but will not produce skin bumps. In addition, pregnancy, drugs, environmental factors can also cause itchy skin but no bumps. Patients with itchy skin should pay attention to keeping the skin hygienically clean and avoiding exposure to the sun. Do not smoke or drink alcohol during the recovery process, or it will easily lead to worsening of symptoms. Itchy skin but no bumps, it is recommended to go to the hospital timely examination to clarify the cause, under the guidance of the doctor symptomatic treatment.