Tattoos, commonly known as tattoos, are called nirvana in ancient classical Chinese. They depict an ideal picture on people's monotonous skin and become the eternity of life. As the most beautiful picture of life, preserving memories is not the exclusive mark of bad people. Tattoo patterns, whether words or patterns, are always to please yourself and others, no matter where your tattoo is. Some people say that tattoos are a symbol of beauty, mystery, sexiness and charm, a manifestation of unique personality and self-expression, and an expression of personal beliefs. Many people fall in love with this painful beauty and carve tattoos on themselves. Let yourself have a new hope, a new sustenance and a new beginning. Tattoos, as a part of human history and culture, have lasted for more than two thousand years. Tattoos in life give people the impression that most of them are incredible, and they directly think that they are exclusive products of gangsters. In fact, this concept is not suitable for modern times. In recent years, with the increasingly open society, people have accepted a lot of cultural information from Europe, America, Japan and other countries. Modern people are not as traditional as before, and tattoos are no longer taboo. But from a medical point of view, tattooing is a harmful behavior. Skin is the first line of defense of human body, which can resist the damage of external mechanical, physical and chemical stimuli and the invasion of pathogenic microorganisms, and plays an important role in human health. Tattoos, on the other hand, destroy this line of defense, making the human body's ability to resist various stimuli decline, especially prone to bacterial infection.