How can you tell if a tattoo is infected?

Some signs and symptoms of an infected tattoo include skin rashes or an allergic reaction to the dye, raised scar tissue, and a tattoo that is still oozing blood or fluid after several days, according to WebMD. It is normal for a tattoo to appear swollen and have a surface crust for a few days, but anything beyond that should be seen by a physician.

Proper care of a tattoo can help prevent any negative reactions. Use any medications the tattoo artist provides or recommends, and follow the instructions for use carefully. Apply direct pressure to the area to help stop any bleeding, use a cold pack to reduce swelling and take an antihistamine to help relieve itching.