Hi, the symptoms and signs of a skin infection that may arise from the process of tattooing are redness, swelling and pain with discharge. These signs happen several days after the procedure.
Another type of infection is related to the transmission through the use of contaminated needles that cut / penetrate the skin ie. tattoo needles.
HIV and hepatitis B and C are some examples of such transmissible infections. These, however, can take several weeks before the symptoms become apparent.
Hope this helps.
regards,
Dr Ben
Related: The Ultimate Guide to Tattoo Removal in Singapore