Is the tattoo pigment poisonous? Is it harmful to health?

It's just that the dyes used for professional tattoos are red like mercury, yellow like cadmium, green like chromium and blue like cobalt. The number of treatments is more. Amateur tattoos are usually black, gray or blue-black. Common pigments are carbon ink or Indian ink. Domestic ink is generally distributed in different depths of dermis. Amateur tattoos are relatively easy to get rid of. The tattoo method is incorrect and the disinfection is not strict, which is easy to cause infection or infectious diseases.