Prickly heat in 7 year old toddlers mainly includes topical medication and systemic medication. Prickly heat, also known as corn rash, is a common skin disease in summer or hot environment, the treatment mainly includes topical medication and systemic medication, topical medication mainly includes glycerite lotion or prickly heat powder. Systemic medication includes oral antihistamines such as loratadine and oral antibiotics such as penicillin and cephalosporin for secondary bacterial infections. Children should be treated under the guidance of a doctor when using medication, and should pay attention to daily ventilation, loose clothing and ventilation, personal hygiene of young children, and pay attention to balanced nutrition and a light diet.