My Son Is 19 And Is Constantly Cold . His
Nothing to worry about
Hello, thank you for using 'Ask a Doctor'. Cold hands and feet are a common concern for patients, and it's normal to think there might be something wrong. However, for the vast majority (like, 99%), this is just a case of having a normal body, just having colder hands and feet than most people, just as some people are very tall or very short, but it doesn't mean anything is wrong with them.
Rarely, cold hands and feet can be a sign of an underlying disease, such as peripheral artery disease, rheumatologic conditions, or thyroid problems, but at your son's age, these would be very unlikely. If you son doesn't have any other problems, especially any skin problems, I wouldn't consider it worth checking for these. Raynaud's disease can also cause cold fingers and toes, but this is usually temporary and associated with color changes in the skin.
Your son can deal with his cold hands and feet by keeping them warm, and avoiding caffeine and nicotine, which may make the blood vessels to the hands and feet constrict and make the coldness worse.
I hope that answers your question. Please let me know if you still have any concerns, I would be happy to try to address them.