My hands will swell in hot weather.

First of all, you should effectively prevent frostbite: for example, if you eat watermelon in summer, the skin will be slightly thick and reddish in white. In winter, use it to gently rub the frostbitten parts for 3-5 minutes each time, 1~2 times a day for 5 consecutive days, which can effectively prevent the recurrence of frostbite. Boil the vinegar in a pot and apply it to the frostbitten area in winter, 2-3 times a day for 7 days. And can reduce the chance of frostbite. If frostbite is always prone to occur, you can take some drugs that dilate blood vessels and promote blood circulation, such as niacin and vitamin E, and eat more mutton and dog meat to prevent frostbite.

◆ Protect exposed areas in severe winter, such as using masks, gloves and windproof earmuffs when going out. Applying a small amount of vaseline can reduce the heat dissipation of the skin and also has the effect of heat preservation. The size and tightness of shoes and socks should be appropriate, neither too tight nor too small.

◆ Humidity will accelerate heat dissipation in the body, and it is easy to get frostbite. Therefore, clothes, shoes and socks should be kept dry, and they should be replaced in time after getting wet, which is conducive to keeping warm.

◆ Avoid long-term immobility of limbs, sedentary activities after standing for a long time, promote blood circulation and reduce frostbite.

◆ People who are prone to frostbite in winter, except those with blisters or canker skin, can use ginger or pepper to wipe the frostbite-prone parts twice a day, which can reduce or avoid frostbite.

◆ Keep warm for frostbitten parts.

◆ 100 watt bulb can also be used instead of infrared ray instrument for irradiation treatment. And massage regularly to promote blood circulation. After about 1 week, the symptoms can disappear and the epidermis gradually falls off without leaving scars.