The ears protrude from both sides of the head, and the skin is very thin with little subcutaneous tissue, which is closely connected with the auricle cartilage. Due to the lack of subcutaneous fat protection and superficial blood vessels of auricle, when cold stimulation is encountered, vascular contraction is prone to ischemia and hypoxia and auricle frostbite. After the auricle is frostbitten, gently massaging the auricle by hand can promote local blood circulation. No matter how severe the frostbite is, never go to a hot room for heating or suddenly use a hot water bottle or hot towel to avoid causing vasospasm and local necrosis. Do not rub hard, otherwise it will easily cause local blood circulation disorder, auricle pseudocyst and auricle periostitis.

Precautions: Wear gloves and winter hat when going out in snowy days. It is best to protect your ears with a hat in winter, otherwise you should wear earmuffs. Keep your feet warm and dry, and change your socks when they are wet; Stop activities when the wind is strong and find a sheltered place to rest; Massage and rub the parts prone to frostbite frequently to promote blood circulation. At the same time, I often take part in physical exercise to improve my body's adaptability to the cold.