I’m about to buy my first chest binder 
Anything I should know regarding health and safety? I live in a very hot and humid part of the country and am a little nervous that it will make me pass out or will damage my body in some way. Any advice? Will it increase the risk of breast cancer?
It is pretty hot but you won’t pass out, barring any medical conditions etc. Make sure it fits well (not too tight, you should be able to breathe and move comfortably in it.)
Dont sleep in it, dont work out in it, try not to wear it for more than 8hrs straight. Take breaks if you can.