It is necessary to use clean and tattoo supplies when tattooing. This is a prerequisite for ensuring that it is not susceptible to infection. You need to do tattoo aftercare to get a nice tattoo. In some cases, you may still be infected for a variety of reasons, and the infected tattoo will have some common symptoms. Generally, some of these symptoms may also be that it is healing. However, the more symptoms that occur at the same time, the higher the chance of infection.