Two-year-old baby peeing shouting pain may be caused by urinary system infection, the emergence of urinary stones, local injuries and other reasons. 1. urinary system infection: because two-year-old babies are relatively small, do not understand, some easy to crawl around on the ground. Hands stained with bacteria often use their hands to touch and scratch the urethra, which may lead to urinary tract infections, pain when urinating as well as burning sensation in the urethra and other symptoms. 2. the emergence of urinary stones: two-year-old baby peeing shouting pain may be blind calcium, overdose of cod liver oil or excessive supplementation of vitamins and other reasons. May also be due to long-term eating a lot of fruits, soy products and cold foods lead to urinary stones, the phenomenon of painful urination. 3. Localized injuries: The appearance of two-year-old babies peeing and shouting pain may be caused by localized injuries. Such as riding across the injury or urethra accidentally scratched and so on may lead to the phenomenon of painful urination. If the two-year-old baby appears to pee shouting pain, it is recommended to consult a doctor in time. Under the guidance of professional doctors, take appropriate treatment plan.