Frozen fingers are a pre-symptom of frostbite. The hands, feet, and ears are the terminal part of the body’s blood circulation and are the preferred site for frostbite. After late autumn, the temperature suddenly drops and the blood flow in the peripheral vessels becomes slow. When the temperature falls below 10 degrees Celsius, the small subcutaneous arteries in these areas contract in response to the cold, and venous reflux is poor, resulting in frostbite. In some cases, frostbite is also induced by congenital mutations and narrowing of the blood vessels, resulting in poor blood flow. Frostbite prevention and relief: 1. Soak your finger in hot salt water for 15 minutes for 1 week. 2, “ten drops of water” external rubbing finger frostbite local, 6 to 10 times a day, for finger frostbite without ulceration is more effective; if finger frostbite skin rupture erosion, can first use erythromycin ointment rub, to be dissipated after the inflammation and then use ten drops of water. 3, finger frost swelling just when the beginning, every night with a hair dryer while rubbing, a few days later there is no. 4, with wound wet pain cream paste local treatment finger frost swelling, self-conscious hot itch or burning pain of the first degree of frostbite, to achieve good results, the method is to first wash the affected area with warm water, dry the ointment tightly paste on the affected skin, generally paste 24 hours can be healed, such as not healed can then change paste several times, skin breakdown or allergies are not suitable paste.