The gallbladder of this fish has the effects of clearing away heat and toxic materials, clearing liver and improving eyesight. Fish gall is the gallbladder of fish, which is located on the ventral side of fish trunk. It is toxic and inedible, but it can be used as an auxiliary medicine for other Chinese herbal medicines. Fish gall has the effects of clearing away heat and toxic materials, clearing liver-fire and improving eyesight, and can be used to treat red eyes and swelling and pain. Clearing the liver and improving eyesight: Chinese medicine believes that the liver opens its eyes and the liver and gallbladder are exterior and interior, so animals have the function of improving eyesight. Although fish gall is poisonous, it tastes bitter and cold, belongs to the liver and gallbladder meridian, has the effect of improving eyesight, and can cure liver fire, red eyes and swelling and pain. It also has the effect of improving eyesight and removing nebula, and the effect is better when used in combination with cicada slough and cereal grass. Clearing away heat and toxic materials: Fish gall can also clear away heat and toxic materials, mainly clearing away liver meridian pathogenic heat and relieving spasm. Can be used for treating convulsion, epilepsy and convulsion caused by excessive liver fire and excessive hot air.