Prickly heat in 9 month old babies can be treated with general treatment and medication. Prickly heat is a common superficial, inflammatory skin condition in summer or hot environments, most commonly seen in infants, children, obese and sweaty people. Patients mainly present with small raised blisters or papules on the skin, and some patients can feel tingling or itching symptoms. Prickly heat is a self-limiting disease, usually after adjusting the room temperature, wiping excess sweat and other general treatment symptoms can gradually subside. Glycerine lotion can be used to relieve the itching symptoms. If the symptoms are more serious, it is necessary to consult a doctor in time to standardize the use of medication under the guidance of the doctor. Daily attention should be paid to the baby to wear loose clothing, keep the room ventilated, cool, if necessary, the appropriate use of fans, air-conditioning, to promote the recovery of the body.