To use medicinal bar soap, products that have long-term deodorization, broad-spectrum sterilization, and low skin irritation must be selected, such as sulfur bar soap and borax bar soap. Try to use recently produced bar soap products, because the unsaturated fatty acids contained in the bar soap raw materials will be oxidized by oxygen, light, microorganisms, etc., and even rancidity will occur. At the same time, the water in the bar soap will also be lost, affecting the use effect.
