Increasing redness that spreads beyond the tattoo
Swelling that gets worse instead of better
Skin that feels hot to the touch
Severe or worsening pain
Thick yellow, green, or foul-smelling discharge
Pus or persistent oozing
Fever or chills
Red streaks extending from the tattoo
Rash or blisters around the tattoo
Tender swollen lymph nodes
The tattoo not improving after a few days
Symptoms getting worse after initial healing
Darkening, blackening, or tissue breakdown
Trouble moving the area because of pain or swelling