Your tattoo isn't decoration. It's a permanent immune provocation. Ink particles hit your skin, your body flags them as invaders. Macrophages swarm, try to digest them, can't, die, release the ink back out. New macrophages arrive. Repeat forever. Chronic low-level inflammation, locked in. Over time particles leak into lymph nodes through your lymphatic system, stressing your immune response. Emerging research shows this buildup might tank vaccine effectiveness, including mRNA types. Many inks contain heavy metals like nickel and cobalt. The inflammation plus heavy metals equals a modestly elevated risk of lymphoma and skin cancer. Your body is literally fighting foreign invaders in your skin for decades. Pretty wild price for self-expression.