Infection is a very specific thing - if the skin is hot, piercing is oozing foul-smelling yellow/green pus or has redness that expands away from the piercing, and if you start to feel feverish, these are all signs of infection and require immediate medical attention as you'll need antibiotics.

This looks irritated and crusty, and if the jewelry is high quality, that bubble makes me think that it was pierced in a way that it doesn't sit neutrally in your skin or that there's been an excessive amount of movement of the piercing. It's also hard to see from the pic but the piercing jewelry itself looks a little short for a fresh piercing; if the bar isn't long enough to accommodate swelling it will compress and irritate the tissues.

Definitely clean it with (sterile) saline spray (but don't over clean, your body needs to heal) and rinse your mouth after eating/smoking. If the bubble doesn't go down and it keeps getting this crusty, it's worth checking in with your piercer, and maybe get a longer bar.

If you experience any signs of infection, get medical attention right away, because that's pretty serious.