Gastroenteritis is a western medical concept, but in Chinese medicine, it belongs to the category of “diarrhea”, with diarrhea and abdominal pain as the main manifestations. Calcined oyster is a product of calcined oyster in traditional Chinese medicine, which has the effect of astringent and astringent (astringent consolidation), and can be clinically used for the treatment of acute and chronic gastroenteritis and other gastric acid oversupply. Calcined oyster is salty, astringent and slightly cold in nature. It has the effects of astringency and solidification of astringency, acid suppression and pain relief (suppressing gastric acid and alleviating pain), re-calming and tranquilizing of the mind (stabilizing the mind with ores and shellfish), and softening and dispersing of knots (softening and dispersing the hard lumps). This product is often used in treating restlessness of the heart and mind, palpitation and insomnia, hyperactivity of liver yang (excessive liver yang causing dizziness, dizziness and headache), dizziness of the head and eyes, phlegm nuclei (subcutaneous lumps swollen like nuclei), scrofula (mainly refers to cervical lymph node nodule tuberculosis), spontaneous sweating (involuntary sweating during the daytime, aggravated by sweating with slight movement), night sweating (unusual sweating after going to sleep, stopping sweating after waking up), spermatorrhea, enuresis, and dyspareunia. This product is often used in the treatment of simple lymphadenitis which is characterized by liver depression and phlegm condensation, as well as gastric and duodenal ulcers, acute and chronic gastroenteritis, and other people with excessive stomach acid. The adverse reactions of this product are not clear at present. Note that this product is prohibited for those who are allergic to this product, allergic individuals should be cautious, external surface evidence (mainly manifested as respiratory symptoms after feeling the external evil) and surface evidence of unresolved should not be taken, and is contraindicated for those who are constipated. If you need to use this product, you should be under the guidance of a physician, do not blindly use your own medication, so as not to cause adverse reactions.