Musk, the secretion of the glandular sac between the navel and genitalia of mature males of the deer family Muskidae, Musk horse, or Musk primordialis, is granular or lumpy when dried, with a special aroma and bitter taste, and can be made into spices or used as medicine. It is mainly produced in Sichuan, Tibet, Yunnan, Shaanxi, Gansu, Inner Mongolia and other places. Musk is also known as navel fragrance, fragrant navel seed, inch grass, musk navel fragrance, stinky seed, four taste stinky, relic fragrance, heart knot fragrance, when the Siemens, etc.. The drug is warm in nature and pungent in taste. It belongs to the heart, spleen and liver meridians. The effects of musk are mainly enlightening, blood circulation, relieving pain and inducing labor. The dosage of musk is 3-5% for internal use in pills and powder; for external use, it can be sucked into the throat, nasal prick, dotted in the eyes, rubbed or put into ointment. It can also be used for sores, swelling and poisoning, sore throat, obstructed labor, stillbirths, and unreturned cellular clothes; it can also be used for stasis of blood and amenorrhea, obstruction of the abdomen and heart, bruises and injuries, and wind-cold and damp paralysis. Garlic is prohibited when taking musk. It is prohibited to be taken by people with deficiency; the product aborts fetus and is prohibited to be used internally and externally by pregnant women. According to modern pharmacological research, musk has a bi-directional effect on the central nervous system. It has anti-inflammatory, analgesic and cardiotonic effects. Musk has an excitatory effect on epinephrine and beta receptors in the peripheral blood vessels. Musk has an anti-premature effect. Musk suspension can prevent and control gastric ulcers.