Tongue piercings can get irritated very easily. That's why the healing process sucks so much - you have to be SO careful and restrictive with what you eat and drink to avoid irritation. Super salty, acidic, crunchy, or chewy foods can aggravate the piercing, and carbonated, bitter, or alcoholic beverages are also bad for it. Talking a lot can also aggravate it, as well as if you tend to play with the jewelry. One thing that really helped me with the swelling on mine was to freeze some chamomile tea into ice cubes and put that on my tongue. It helped with the healing and decreased the swelling. Good luck!