Children in rural areas have been frostbitten before. What methods have you used?

I remember when I was a child, the weather in winter was much colder than it is now. The ice in the river is so thick that we all skate on it. The ice cone on the roof is thick and long, and it snows heavily every year. We will have a snowball fight and make a snowman in the snow. But while enjoying the happiness brought by the cold winter, we have to face one thing, that is frostbite. When I was a child, my hands were frostbitten every winter, not only red and swollen, but also itchy. Sometimes when it is serious, my skin will be damaged and sticky liquid will flow out, so the gloves will never leave my hands. At that time, there was no money to buy any good drug treatment, so we could only use some conventional methods. At that time, there was a product called moisturizing oil, which was very cheap and had a good effect on chapped skin and chilblain. You should put some on your hands every time you wash them. It's oily. I forgot how much it cost, and it worked very well.