Tattoos may damage the skin, cause skin infections, complications and other hazards of skin diseases. 1. Damage to the skin: tattoos when the use of needle tools to the skin for stabbing, tattooing, etc., easy to cause skin infection and inflammation, and may even cause permanent scars. 2. Skin infection: the skin can play a good blocking the damage caused by the outside world, is the body’s resistance to external environmental stimuli of the first line of defense. Tattoos may damage the skin, reduce the skin’s resistance to external stimuli, etc. Tattoos generally also lead to skin wounds, increasing the risk of infection. 3. Skin allergies: tattoos generally need to be some pigment dyes into the bottom layer of the skin, which may contain many chemicals, there may be a risk of causing dermatitis, allergies and other risks, resulting in local skin itching, redness, swelling, heat and pain, numbness and other sensations. In addition, if it is an irregular tattoo parlor, sterilization is not clean, etc. It is easy to get infected with tuberculosis, hepatitis B, AIDS and other infectious diseases. It is recommended to consider carefully before tattooing to avoid unnecessary harm.