*************Is there such a thing as being hot blooded? My husband and daughter always feel warm while my son and I are freezing. Is it genetic? Is it a skin thickness?
M*W: Well, in my neck of the woods, "hot-blooded" has an entirely different meaning... but back to your question.
Although inflammation can raise your temp, if there is truly an immunity issue, you could be constantly fighting off a mild inflammation and your leukocytes would be higher than normal. When I say "inflammation," I don't just mean a cold or virus, I mean organ inflammation. Scientists now have concluded that heart disease, for example, starts in early childhood due to an inflammatory process, but it doesn't appear nor can be completely ruled out until the person is older and unfortunately has their first heart attack (in most cases). It happened to me. I always had a high white cell count but wasn't sick with anything. I always had perfect health and labs. Then I had a heart attack, and then another one. That inflammatory process that I'd been staving off for years inflamed my heart, kidneys and liver, yet I never missed a day of work, and I never felt ill! So, it's not truly what you eat, but that does play a role in heart disease.
But as to your hot- and cold-blooded family members, I would first get their thyroids checked. If they're cold all the time, they could have a low thyroid function. If they warm all the time, it could be an inflammatory process, and I'd watch that very carefully. Don't just rely on a general practitioner to diagnose a healthy heart. All hearts sound healthy to a general doctor. Go to a cardiologist who can study the heart more intensely. That's the only way to prevent heart problems and sudden heart attacks.
But, in general, go get your thyroid checked out by an endocrinologist, especially since you said you were freezing all the time which is a very loud signal that your thyroid is not putting out enought thyroxine. Been there, done that, too. Take the medication and become a "hot-blooded woman."