Snake gall is a precious medicinal material since ancient times, which is widely used in clinic or folk. Snake gall is regarded as a precious traditional Chinese medicine, because it has excellent medicinal value, which can dispel wind and remove dampness, cool and improve eyesight, relieve cough and resolve phlegm. Clinically, it is used to treat rheumatoid arthritis, conjunctival congestion, cough with excessive phlegm, convulsion, hemiplegia, hemorrhoid swelling and pain, and various corneal diseases. , all have good curative effect. There is also a traditional diet for treating stomach diseases by eating snake gall.

The color of snake gall is mostly bright green. Generally light yellow or orange yellow is called "water gall" and is usually not used as medicine. There are also some species, such as Zaocys. Although it is orange or reddish when caught from the wild, it will turn dark green after a period of artificial breeding. As far as the quality of snake gall is concerned, snake gall in winter is the best, followed by late autumn and early summer. Usually, in order to obtain good quality snake gall, live snakes must be starved for about 7 ~ 10 days before taking them. Because snakes don't eat, bile accumulates the strongest and most. After taking it out, it should be placed in a dark and ventilated place, and fresh bile should not be placed for too long.