I know most of the time this is due to over feeding or over supplementation. I just recently recieved 11 new leapard geckos that where all house in one 20 gallon aquarium. There is what looks to be coconut husk as there substrate, a water bowl and a lay box that they all stayed in together. I know this is no way to house them and immediately separated them for now. I do not know what diseases they may have so they are isolated until I can be sure they are safe. Anyway one of them has air bubbles which I am familiar with however they encompass her entire chest and front legs. There is also bubbles along her sides that are smaller. I think she might be impacted but I am not sure as I just recieved them all yesterday. Any wisdom out there?