Axillary odor, also known as fox odor, is a special odor that occurs in the armpit, and its secretion is a milky white milk-like fluid containing proteins and lipids, which itself has no odor and is decomposed by local parasitic bacteria, especially rod-shaped bacilli, after reaching the skin surface, producing unsaturated fatty acids and emitting odor. The degree of development and secretory function of the sweat glands is related to race, genetics and age. Yellow people have less secretion than whites and blacks, so the incidence is low. Endocrine influence on the development of the sweat glands in adolescence, and gradually recede in old age, so the onset of axillary odor often in adolescence, into old age can naturally reduce. In addition to the axilla, the vulva, anus, umbilicus and areola also have sweat glands, so these parts can also occur in the same odor. Patients with axillary odor should be older than 18 years old to avoid recurrence due to regeneration of the sweat glands. The sweat glands are not visible to the naked eye, so any treatment to remove the sweat glands is based on the anatomical relationship between the hair follicles and the sweat glands. Very few patients have abnormal sweat glands respectively, and some odor may remain after surgery. At present, the main methods of axillary odor treatment are as follows: 1, non-invasive treatment: non-invasive treatment mainly refers to drug therapy. The mechanism is: ① astringent drying, to avoid excessive sweating; ② antibacterial sterilization, to reduce the role of microorganisms; ③ odor masking, with strong aroma to cover the smell of axillary odor. Drug treatment is mostly symptomatic treatment, with limited efficacy and short duration. 2, small incision minimally invasive treatment: from the cause of axillary odor, it is easy to see that almost all intrinsic causes are related to the top secretory sweat gland, so the destruction of the top secretory sweat gland is considered to be the key to the root of axillary odor. Since the acromegaly is not visible, the hair becomes the target of axillary odor treatment. It is usually believed that the axillary hair area is where the acromegaly is densely distributed, and many treatments target the hair shaft to destroy the hair follicle, thus indirectly destroying the acromegaly. The most common design is to design an incision along the axillary crease about 3-100px long, then fully free the skin through the incision, then flip the flap and trim the apocrine sweat glands under visual conditions. The efficacy of this method is very certain, but postoperative braking and dressing fixation is very important, otherwise there may be a risk of hematoma and skin flap necrosis. 3, local injection of botulinum toxin for axillary odor: botulinum toxin can inhibit the secretion of top-secreting sweat glands and other glands through the inhibition of cholinergic effects to achieve the effect of reducing odor. This treatment method is simple and easy, less traumatic, especially suitable for the treatment of odor in the vulva area, obviously many surgical methods for axillary odor are not applicable to the vulva area, the disadvantage is that the maintenance time is short (about 6 months).