Patient's question:
When it's cold, my hands turn purple-black. I'm already 18, but I still hate biting my nails. I've been doing it for 5-6 years. The reason is that I was a child who was not strictly managed. Now, what should I do?Doctor's answer:
When it's cold, your hands turn purplish-black, which indicates poor blood circulation. If you dislike biting your nails and have been doing so for 5-6 years, there are two possible reasons: it could be a habit, or it might be due to a lack of trace elements or similar issues. The above suggestions are for the question "When it's cold, why do my hands turn purplish-black, and I'm 18 years old but still like biting my nails?" I hope this helps, and wish you good health!