Sometimes my head feels sooooo hot, and i dont know why?

i think i might be experiencing burnout a lot because i study all the time..i just hate that i feel kinda sick because of it most of the time...trust me its not because im eating less because when i feel like this i trell myself its because i need to eat something and it does make me feel better but i dont think that's it at all...has anyone ever experienced this? what should i do??