Men shaving armpit hair is usually more harmful, which mainly includes damage to the skin, induced folliculitis, induced dermatitis and so on. 1. Damage to the skin: the use of shaving blade for shaving armpit hair process, if the operation is not careful, may lead to skin damage bleeding, and even lead to local skin infection. 2. Induce folliculitis: as a normal physiological structure, underarm hair has the function of absorbing sweat and reducing friction. After shaving the armpit hair, the sweat will increase the irritation to the skin and may even lead to bacterial growth, thus inducing folliculitis. 3. Induce dermatitis: repeated stimulation of sweat, friction and other factors can easily induce inflammatory changes in the local skin, which can be manifested as local rashes, itching and so on. Armpit hair belongs to the skin appendage structure, in the absence of special circumstances, it is recommended not to carry out too much treatment, if necessary, you can go to the hospital, consult the doctor’s advice.