In addition to armpit hair, forearms, calf hair, etc., for men, beard and chest hair can also be considered for hair removal. After hair removal, the number of hairs will be significantly reduced, and the residual hairs are relatively fine, soft and light in color, which can meet the requirements of aesthetics. The common clinical method of beard removal is laser hair removal, the principle of which is that when the laser irradiates the skin tissue, it can destroy the cells of the hair layer, resulting in irreversible damage to the hair follicle to achieve the effect of hair removal. Under normal circumstances, after laser beard removal surgery, patients will only have a mild burning sensation, which usually disappears within 2-3 hours, and some people with localized slight redness and swelling will also recover within 2-3 days, and side effects are rare. However, in the treatment, due to each patient’s skin conditions, the nature of the hair, the hospital treatment equipment is inconsistent and the operation of the equipment of the personnel technology and other factors, the patient may appear after the treatment of a variety of different adverse reactions, specifically including: 1, allergies or scars, or postoperative complications of infection as well as laser energy damage to the skin is too deep, too large patients easy to leave scars; 2, the skin will often have a change in color after the damage The color of the skin often changes after the skin damage, which can eventually fade to the same color as the surrounding skin, and some candidates have hyperpigmentation; 3, the instrument is not sensitive or the doctor’s operation level is not up to standard, which can lead to blisters, skin ulcers or burnt scabs and other adverse reactions in the treatment of hair removal or after the treatment; 4, the preoperative examination is not meticulous, resulting in the acceptance of hormone drug therapy, chemotherapy, radiotherapy, or skin infection, scarred body of the crowd Accepted this treatment, can aggravate the original disease, or even lead to more serious complications.