Yes, the tattoo will change with the skin it is on. When you gain weight, the skin stretches; when you lose weight, the skin shrinks. Any tattoos will expand and contract when the skin stretches and shrinks. If your skin gets more firm, your tattoo will likely look better than it did before. If you lose weight dramatically and quickly, however, your skin will sag and the tattoo with it.

Pregnancy weight gain and loss will quite likely cause tattoo distortion if the tattoo is in the midsection. This is why women are advised not to get tattoos on this part of the body if they think they may still have children. The rapidity of the weight loss and gain is the cause of the trouble; the tattoo will suffer from the rapid changes.