The swim bladder has high nutritional value, is rich in protein and fat, and can be used for treating furuncle, swelling and pain, nameless swelling, skin rupture and malignant tumor. Low back pain, rheumatic low back pain, gastropathy, tuberculosis, whooping cough, hematemesis, aplastic anemia, Yangling, tracheitis, postpartum hemorrhage and abdominal pain. It has good curative effect on kidney calculi, gastric and duodenal ulcer, rheumatic heart disease, gynecological pedicle and irregular menstruation. Fish fat can also be used as a shell and adhesive for rubber pills. High viscosity gelatin or yellow croaker glue made from fish fat is as high as 95%. The advantages of women often eating fish fat: it can nourish yin and increase collagen in the skin.