A concussion is a type of traumatic brain injury (TBI) that is caused by a bump or a blow to the head. Even a mild blow or "getting your bell rung," can be a serious matter. Signs of a concussion may not show up until days or weeks after the injury. Seek medical attention right away if you notice any signs of concussion in your child.
Dehydration happens when the amount of fluids that a person is drinking is less than the amount of fluids lost through sweating, urination, diarrhea or vomiting. Dehydration is very common when exercising outside, and it can lead to more serious problems like heat exhaustion and heat stroke. It's important to stay well hydrated by drinking plenty of water.