The more work I do with a muscle the more gas in that area that is under the skin. Message help a good bit but burping helps the most. I actually feel the gas traveling through my body. When it comes up my legs it might come out my anus. If it is in my neck it might come out my upper throat. If it is in my arms it will come out my lower esophagus. My chiropractor said he thought it had something to do with my lymphatic system.