Layer with tights and socks when you go outside and sleep with long johns and socks. Rubbing lanolin ointment on your feet can also help to retain heat. If you develop chilblains, do not scratch them. Rubbing on lotions with a witch hazel or calamine base will relieve some of the itching and burning. If your feet have ulcerated, it's best to see a doctor.
Ingrown nails occur when the nail grows into the skin and becomes embedded.
Although ingrown nails can be caused by poor nail structure, improperly fitting shoes and hosiery or injury, the most common cause is cutting your nails improperly. Nails should not be cut too short, nor should they be cut down the sides. Cut them the same shape as your toe or, better yet, file them the same shape as your toe. If your toe becomes inflamed, you can bathe it in a saline solution, but you should see a doctor as soon as possible. Athlete's foot is a common fungal infection that can manifest on both skin and nails.