Person always hot

I have a friend that is complaining to always be hot (in temperature). Even when the temperature outside is cool. This person is also overweight. And in fact her Dad who is also overweight experiences the same problem. So it's like she inherited being hot from him. Her step mom no blood relation doesn't have the problem even though she is overweight..

I'm trying to think what advice I could give to this person. I don't ever know what this problem is called. Tweet