I have diabetes, but it's under control, with cholesterol, blood sugar, etc. all at nominal levels. I also have low testosterone, which I'm currently not doing much about. My feet are constantly getting cold when I'm sitting down. When I'm walking around, it's fine, but when sit down for a while, my feet start to get really cold, like biting, painful, uncomfortable cold. If I let this last for a while, I start to get sick, with bad cold symptoms.