What does it mean if i have hives on my neck and hands sore throat and blood in my poop?

Infection: You need to visit a pediatrician for work-up of an underlying infection which cause the hives, sore throat, and blood in your feces.

See below: Without having an exam, it would be difficult to know for sure. However, it almost sounds like hand, foot, and mouth disease, a common illness caused by a virus. Best to see your physician.