Recurrent rashes on the body may be due to eczema, chronic urticaria or infections. 1. Eczema: Eczema is a chronic inflammatory itchy skin disease, the pathogenesis is still unclear, but usually considered to be related to genetics, immune abnormalities, hormone level changes and endocrine diseases and other factors, usually manifested as pimples, pimples and other skin lesions, so the recurrent red rash on the body is considered to be probably caused by eczema. 2. Chronic urticaria: urticaria is due to a variety of reasons leading to mast cell activation, resulting in increased expansion of small blood vessels in the skin as well as mucous membranes, usually manifested in the wind and angioedema, the size and shape of the wind varies, and may lead to recurrent rashes on the body. 3. Infection: If the patient has repeated bacterial or viral infections, resulting in vasodilatation of the skin all over the body, it can also cause recurrent red rash. As the causes of recurrent red rash are many, so when the patient appears related to the discomfort, it is recommended to go to the hospital in time for examination and diagnosis, as soon as possible to clarify the cause of the disease and to carry out active targeted treatment, timely control of the condition to avoid the worsening of the symptoms caused by the delay.