Well there is always the risk of getting an infection, always. But there are many ways to minimize those risks. Like ALWAYS sterilize your needles to the best of your abilities, sterilize your skin with rubbing alcohol, just sterilize everything that comes in contact with the needle, ink, and your skin. You also should have great aftercare for your stick n poke by washing it with antibacterial soap and don’t pick your tattoo when it scabs! Im sorry I can’t really say how likely it is to get an infection, it varies from how well you sterilize your equipment, keep up with aftercare, and how your body takes to the tattoo. Hope this helps, Happy Poking!