Are you cold all the time?

Cold all the time? Here's why 

By Dr. Manny Alvarez 

Published December 01, 2014 FoxNews.com 

We all feel chilled to the bone every now and then - especially during cold winter months. But when you just can't warm up - is there a deeper, underlying issue? 

We received this email from a viewer: Q: I'm always cold. My doctor tested my thyroid levels, which were normal. Is there another reason, or test I can have to diagnose my constant cold hands? Your thyroid can contribute to being cold all the time, but other reasons may include: * Skipping meals - The body conserves energy and produces less heat when you don't eat. * Not getting enough sleep - This can make you feel rundown and less active. * Anemia - A simple blood test can detect if you are anemic.* Hormonal imbalances - In women, fluctuating estrogen levels can make you sensitive to cold temperatures. * Raynaud's disease - The blood vessels and smaller arteries that supply blood to the skin constrict and limit circulation. * Low body weight - Alvarez said he is referring to muscle mass and body fat. 

Using your muscles generates heat, and fat acts as insulation. If you are always feeling cold, go to your primary care physician and have a physical. And you may even want to see an endocrinologist. Do you have a health question you want me to answer? Email me at DrManny@foxnews.com Dr. Manny Alvarez serves as Fox News Channel's Senior Managing Editor for Health News. Prior to this position, Alvarez was a FNC medical contributor. Follow Dr. Manny on Facebook .