Sea willow has the effect of diuresis (facilitating urination, eliminating edema), softening and dispersing hard lumps (softening and dispersing hard lumps), eliminating food stagnation (promoting food digestion), and is used to treat stagnant food, generalized edema, and plaques (lumps) caused by silt and blood and qi aggregation. Sea willow, also known as Yue Wang Yu calculation, for the sea chopsticks family animals sand chopsticks hydrozoa body secretion of limestone bone, its taste salty, sex flat, to the liver, spleen, kidney meridian. Its effects include softening and dispersing hard lumps, inducing diuresis and swelling, eliminating food and stagnation, etc. It is mainly used in the treatment of stagnation and stagnation, abdominal hollowing, generalized oedema, dysuria, and lumps caused by stagnation of blood and qi gathering. Hai Liu is used as decoction or boiled food for internal use, and its adverse reactions and contraindications are not clear. If there is a need to use the drug, it is recommended to use the drug according to the doctor’s prescription after diagnosis by a physician, and should not be used on one’s own.