My mother and I both have always been like this, we over heat very easily..We faint, vomit or just wilt when overheated. You probably know people that are always cold.. We are like them but the opposite..
I do not like closed toed shoes because in the winter, my feet are always hot so I like to feel the cold.. I once was in New York City during the winter.. Everybody was talking about how cold it was and I had to take off my coat and carry it around. All I needed was a hat to keep warm.. My family calls me "a furnace".
In the summer, I wear sleeveless tops and short, skorts or skirts. I can only wear cotton. Tennis shoes are like torture.. Too hot.. I own all types of sandals and wear them all of the time unless it is a formal event.
I keep a cooler in the car filled with ice and water, and juice, fruit. I walk around with a cup of iced water when I am outside. I have to wear a hat or I will wilt.. Also If I can place a cool wet bandanna around my neck it also helps keep me cool.. I have a spray bottle with a battery operated fan that helps if I have to be in a hot area with no cover.. Hiking in the summer is impossible for me. I can do it in the morning, but after 11:00am, I am done..
Some people that suffer with hypothyroidism will be really warm, but my mother and I have been check ed many times and always comes back normal