We found this under the wing of one of our 4 week old broad breasted bronzes yestereday

It's two air bubbles, roughly the size of a nickel. Only on the one side. They seem to cause him no distress, even if I poke them. He acts exactly like the other poults, eating, drinking, running around, peeping whenever I leave the room.... I check all the others over. I found two with tiny air bubbles in their "armpits" but so tiny I would never have noticed unless I was looking for t hem specifically. For now I'm simply observing. I'm not really sure what it is and what the best treatment is. Any thoughts? should I lance it?
It's two air bubbles, roughly the size of a nickel. Only on the one side. They seem to cause him no distress, even if I poke them. He acts exactly like the other poults, eating, drinking, running around, peeping whenever I leave the room.... I check all the others over. I found two with tiny air bubbles in their "armpits" but so tiny I would never have noticed unless I was looking for t hem specifically. For now I'm simply observing. I'm not really sure what it is and what the best treatment is. Any thoughts? should I lance it?