3 year old babies with prickly heat, white heat is the most common, you should control the temperature of the room, use medication to ease the problem. 1. Control indoor temperature: prickly heat is related to the high temperature environment, it is caused by excessive secretion of sweat glands and untimely discharge, if the symptoms are not particularly serious, the symptoms can be relieved by adjusting the room temperature, usually use a fan or air conditioner to reduce the ambient temperature, and try to choose loose and breathable cotton clothing. 2. medication relief: if the itching is more serious, you can use peppermint glycerite lotion or prickly heat powder, etc., but also oral antihistamines such as loratadine as prescribed by the doctor to stop the itching; if the local combination of infections, but also in the doctor’s guidance of the external use of antibiotic ointment, such as erythromycin ointment, mupirocin ointment, etc., and if necessary, can be taken orally, such as amoxicillin and other sensitive antibiotic treatment. 3-year-old baby prickly heat should be based on the severity of the choice of appropriate treatment, the above medication should be used under the guidance of a doctor, to avoid the use of self-medication to cause serious adverse consequences.