Oysters clinically there is no such medicine, if medicinal, its shell is the Chinese medicine oyster, come to the menstrual period can eat. If food oysters, come to menstrual leave can eat. Oyster is the dried shell of oyster family animals, its taste is salty, sex slightly cold, its as a kind of traditional Chinese medicine has the effect of softening and dispersing the knot (softening and dispersing hard lumps), and also can astringe the yin and tranquilize the spirit. It can be used to treat diseases caused by yin deficiency and hyperactivity of yang (deficiency of yin fluid and hyperactivity of yang energy), such as night sweating (abnormal sweating after going to sleep, but sweating stops after waking up), dizziness, etc. It also has a therapeutic effect on palpitations and scrofula (mainly refers to tuberculosis of lymph nodes of the neck). Oysters do not have the effect of activating blood or stopping bleeding, and they have no effect on the volume and cycle of menstruation, so they can be eaten on menstrual leave. Food oysters are also not contraindicated for menstrual periods and can be eaten during menstrual periods. The adverse effects of oysters are not clear, and they are contraindicated for people with spleen deficiency and essence slippage. If you need to use the drug oyster, it is recommended to be used by a traditional Chinese medicine practitioner after diagnosis, avoid self-medication, so as not to cause adverse effects on the body.