Last year was quite stressful.i ended up losing a bunch of hair in 1 month. now there are some bald spots that burn up when i am stressed. why?

Worth checking: You may read up on telogen effluvium; decide if this fits, and consider having a physician see it. You want to know also whether you might be vitamin d deficient or hypothyroid; i trust you do not have an eating disorder. Good luck.

This sounds unusual : See a dermatologist for an evaluation as this does not sound normal and should be examined.