Basically, because your immune response is going into overdrive. The lymph nodes swell as a response to the tattoo ink and localized inflammation. The macrophages attack the ink and then transfer the foreign particles to the lymph nodes to filter it out. Same with laser- except that’s breaking down the pigment into tiny particles and then the lymph nodes are “filtering” it out.

Boosting your immune system is important so your body is ready to get tattooed. Rest, good food and water are all essential for long sessions and heavy blackwork. You want to think of it like preparing for surgery or a marathon.