why do i sweat a lot and get hot easily??

i’ve always been the type of person that needs to be in a coool environment. Where i can breathe. But as soon as i’m in a house that’s so hot and a store that’s hot , i get sooo hot , it’s like a hot flash and then MY ANXIETY acts up . Ugh is it because of my anxiety or something else like health wise? im not even over weight either . im skinny. anyone else like me ? That can’t stand being hot ?