Three-year-old babies shiver when they pee, usually because of heat loss, bladder nerve irritation and other physiological conditions, as well as urinary tract infections and other pathological conditions lead to. 1. physiological situation: three-year-old baby’s neurological development is not yet very perfect, when peeing will lead to heat loss or sudden emptying of urine leads to bladder nerve stimulation and other conditions, may lead to shivering when peeing. 2. Pathological conditions: if the three-year-old baby due to bacterial, viral or microbial infections lead to urinary tract infections, there may also be chills when peeing, usually accompanied by frequent urination, urinary urgency, urinary pain and other symptoms. Three-year-old baby chills when peeing, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.