For the last 8 months i've been throwing up after getting hot, but not all the time. It can be from getting dressed, taking too hot a shower, or from being outside. I am 56 yrs old, female and am post estrogen breast cancer. There seems to be no rhyme or reason for when it happens. I get dressed every day. Yesterday going to the store, it was very hot outside and I did not get sick. Today, in an air conditioned house, getting dressed I get too hot and throw up. I am off two medications that may cause over heating, but it's still happening. I want to know what kind of doctor to see and if anyone knows what this could be. Thanks.