Random nose bleeds

Jensa • Mom to Raven & Gabriel❤️

My son is 3, 4 in October. So far this summer he has had at least three random nose bleeds. The last one was a couple of weeks ago. He has never had them before, but I’m assuming it’s probably because of how hot it has been. I made him an appointment just in case, but it’s not until next Thursday. I’m just wondering what could cause him to be having nose bleeds besides the heat?