The baby bathing with a red rash on the body, after a while and disappeared, consider and external stimulation, contact dermatitis and other factors related. It is recommended to pay attention to the regulation of water temperature, avoid contact with sensitizing or irritating substances. 1. External stimuli: early childhood baby skin is relatively delicate, bathing water temperature is too high, too low, may cause skin irritation, resulting in skin erythema, pimples. It is recommended to pay attention to the regulation of water temperature to avoid skin irritation. 2. Contact dermatitis: the baby’s constitution is sensitive, allergic to shower gel, or shower gel exists irritation, may lead to skin rashes. Remove the triggers, the red rash can gradually subside. It is recommended to replace the toiletries to reduce the undesirable stimuli. After taking a bath with a red rash on the body, it is recommended to go to the hospital pediatrics, dermatology for examination, first to clarify the cause of the skin rash, and then combined with the doctor’s advice to give treatment.