You could have trapped fecal matter or adherent fecal matter. Sometimes this has to be loosened from sticking to the walls by using herbal formulas. You combine psyllium with the herbals and it peels off the sticky, rotting, odor causing "gluey" dehydrated fecal matter that has become stagnant in your colon. It can remain there even if you cleanse with purgatives like they give you before a colonoscopy. You need the herbal formula to soften it and pull it off the walls. Some people "cleanse" every year or 6 months. If you have ever eaten white flour like bread, burger buns, pie crust, cake, this can develop into a sticky residue that builds up in certain places, depending on your individual structure. I know a professional colon health advisor who can stand next to you and tell you if your "colon is dirty". If it is clean, you "pass inspection", because you do not have such an odor. It is also possible to have some retained matter in the last section of your bowel. I recommend using Robert Gray colon cleansing herbal formula with psyllium, and learn the protocol for the cleanse from start to finish--it is a gradual increase and decrease to be easy on the body. You should be able to continue your life normally with this cleanse. If you want to cleanse faster or more intensely, you might have to take a vacation and be away from society. There are several good formulas on the market, found in health food stores. I also irrigate my rectum once in a while, because in some people, there is a build-up of leftover fecal matter there that needs to be swished out with water. This should be done very gently so as not to create a stretched rectum. Consult a colonics professional. Make sure you are digesting well; check your stomach digestive capacity with your doctor and if you need enzymes and HCl, add them...also, taking liquid chlorophyl, found in health food stores, it helps to keep this type of odor under control. For females, anionic sanitary pads or anionic daily wear pads also really helps odor problems. Men can use them too! They not only help to control bacteria growth, they also give you energy!