There is an important reminder to keep the kids well hydrated during these hot summer days. Doctors say they're seeing more young people with kidney stones.

Doctors are seeing an increase in kidney stones in kids but they aren't exactly sure why that is. 

Lack of exercise, obesity, and too much salt in the diet could all be contributing factors. But researchers say many children are not hydrated enough and that could be what's causing the uptick.

“Good hydration will prevent stone formation in people who have had stones and there is no reason to think that's not the case in people who haven't yet had a stone,” said Dr. Caleb Nelson with Pediatric Urology at Children's Hospital Boston.

Doctors say it's important to be aware if there is a family history of kidney stones, because that causes at higher risk for kidney stones.