1) Crush half a catty of ginger, add 2 ounces of salt and 5-6 bowls of water, boil for 10 minute, and wash your feet with boiled water for seven days while it is hot.
2) Wash your feet with raw potato juice once in the morning and once in the evening.
3) Put 1 kg mature vinegar, 1 kg alum and 1 kg garlic in a glass bottle and seal for three days. After that, pour out the soaking feet for 30 minutes every day. After soaking, pour the vinegar water back into the container and seal it for ten days. Be sure to stick to it, and it is best to soak the worn socks.
Dry your feet before going to bed every night, and then apply them comfortably enough. Generally, symptoms of beriberi can be relieved in half a month.