Boy, I've had that freezing digit issue and it sure is uncomfortable! Severe frostbite is not something you wouldn't have noticed. The more mild and moderate frost bite, possibly, could be overlooked at the time. BUT, when it heals, pink skin covers until it is normal skin and people are usually recovered within 6 months after. But, if it was bad enough and things didn't heal properly, I've read you can have permanent issues. From this article: https://www.nhs.uk/conditions/frostbite/treatment/ "After having frostbite, some people are left with permanent problems, such as increased sensitivity to cold, numbness, stiffness and pain in the affected area." I read to not smoke or drink as it can constrict blood flow further and makes things worse and that they sometimes prescribe amitriptyline but that is more for pain.