A tattoo machine is a device used by tattoo artists to create permanent designs on the skin. It works by using a needle that punctures the skin and injects ink into the dermis layer. There are different types of tattoo machines, including coil and rotary machines, each with its own mechanism and advantages. The tattoo machine is an essential tool in the art of tattooing, allowing for precision and control. It has evolved over the years, with modern machines often being lightweight and adjustable, making the tattooing process more efficient and comfortable for both the artist and the client.