What is baby heat rash? Infant heat rash, also called pediatric heat rash, is a common skin disease that mostly occurs in infants and young children under 2 years old. The symptoms are sudden rash and allergic dermatitis, which are common in summer and autumn, especially the affected area is unbearably itchy. Moreover, because the skin of infants and young children is relatively delicate and susceptible to bacterial infection, it needs to be treated in time. Treatment methods for baby heat rash 1. Avoid bacterial infection: change diapers in time, keep them dry, bathe every day, and pay attention to health care