Musk put thirty years is generally not recommended. Musk has the effect of opening the orifices and waking up the mind (opening the brain orifices and waking up the mind), activating blood circulation and promoting menstruation, eliminating swelling and relieving pain (eliminating swelling and pain). It is used for heat illness and fainting (due to the heat evil exuberance caused by the fainting), stroke phlegm syncope (phlegm evil in the body after a stroke caused by cold limbs, or even fainting), qi depression and syncope, in the evil stupor, menstrual closure, and so on. Musk stored for too long or improperly preserved, it will lose its efficacy. General musk to be closed and preserved, placed in a cool dry place, but also for shade, moisture, moth, etc.. Therefore, it is easy to lose the efficacy of musk for thirty years, if you want to use, it is recommended that you first go to a professional organization for identification. Note that musk is prohibited in the case of deficiency; this product, whether taken internally or externally, can abort the fetus, so pregnant women are prohibited. It is recommended to consult a professional doctor before using the drug, standardize the use of drugs.