What are the Symptoms of Hyperthyroidism?

For about the past two or 3 years I've been breaking out in red blotches around my neck and one on my chest every time I got too hot or any amount of sun. I spent a year in the tropics and it really got bad. Now the weather is warming up again it is just as bad. I'm fasting now (which brought me to this forum) and the fasting seems to make it even worse. I was hoping the fasting would burn out whatever toxins might be causing it. I'm about 230lbs and overweight but not to the point I have a big stomach. I'm just kinda a big guy and a little chubby but hope to get down below 200 in the coming months. Are these blotches that I thought were rosacea but someone told me they aren't something to do with my thyroid? Thanks. Tweet