Salt and vinegar foot soak has the effect of promoting human blood circulation, relieving fatigue, sterilizing and relieving itching. The main component of vinegar is acetic acid, soak your feet with the appropriate addition of white vinegar, you can soften the stratum corneum and remove dead skin. The main component of salt is sodium chloride, adding salt to foot washing water can play a role in cleaning the skin. Foot soaking can relieve muscle fatigue, accelerate blood circulation in the lower limbs, improve sleep quality and so on. Therefore, adding salt and vinegar when soaking feet can play a similar role as mentioned above. Note that feet with special diseases such as skin ulcers or diabetic foot patients should not soak their feet; foot soaking time should not be too long, generally no more than 30 minutes; the water temperature should not be too high, generally controlled at about 40 ℃.