What causes red rashes in the shower?

Red rashes on the body after bathing may be related to heat contact urticaria, contact dermatitis, eczema and other causes.
1. Thermal contact urticaria: after contact with warm water for 1 to 2 hours or less, there may be a windy, red spot with itching on the contact area, which may subside after a period of time.
2. Contact dermatitis: contact with allergenic substances such as shower gel in the bath can cause the body to develop an abnormal immune response, resulting in a red rash on the body, usually accompanied by itching.
3. Eczema: due to bathing, improper water temperature or contact with irritating toiletries, etc., induced eczema, or make the original disease aggravated, thus appearing in the bath body red rash.
It is recommended to go to the hospital in time to clarify the cause of eczema and standardize the treatment under the guidance of the doctor.