The main difference between Calcined Oyster and Raw Oyster is that Calcined Oyster has astringent, acidic and pain-relieving properties, which is more suitable for spontaneous sweating, night sweating and male spermatorrhea. Raw oysters are cold in nature, and their main function is to calm the spirit and submerge the yang, nourish the yin and soften the hardness, astringent and stop astringency, and relieve pain. Oysters and calcined oysters also have some differences in appearance and efficacy. The situation is as follows:1. Appearance is different: oysters are fished out of the water, impurities attached to the shell are removed and dried. Calcined oysters are calcined on the basis of raw oysters. Raw oysters are usually grayish yellow or gray, with a rough surface. Calcined oysters are usually grayish white, some are greenish gray, and there is a bit of burnt odor.2. The effect is different: oysters can accelerate the absorption of proteins, amino acids and minerals. And there is also a certain tonic effect on the liver and kidneys and other parts of the body. It can relieve the soreness of the waist, fatigue, dizziness and other symptoms. In addition, oysters are rich in collagen, which can enhance the antioxidant capacity of the skin. And calcined oysters are mostly used in medicine. It is mainly used for the treatment of gastric ulcers and duodenal ulcers, and also has a variety of analgesic and tranquilizing effects.