My breath has smelled like rotten eggs/Sulfur/poop and I don't know why. I've brush 3 times a day (morning, after lunch, before bed.) I floss regularly and use non-alcoholic mouth wash. I had tonsil stones and I thought that was the case, but after removing my tonsils the smell is still there. It feels like it is coming from the top of my mouth. I eat a normal diet. I'm 6'2 & 180lbs so a healthy weight. I'm pretty active and I'm on my feet at my job. I think it is coming from my stomach.