Talk to Ent Specialist on Persistent Bad Breath And Yellow Tongue

I have a serious concern about bad breath. Even though I brush regularly and my teeth seem fine, I still have very bad mouth odor. The smell starts again just a few minutes after brushing. I use an electric toothbrush, do deep cleaning, and also use mouthwash, but the problem continues. Mouthwash makes my tongue burn badly, my eyes water, and I sometimes get small wounds on my tongue. I also use toothpaste, but it feels very strong, and my tongue burns badly when I brush. Sometimes the burning is hard to tolerate. This issue has been with me since childhood. My tongue also looks yellow, and even after cleaning it properly, it becomes yellow again. In the image I attached, the yellow color is not very visible because I cleaned my tongue thoroughly before taking the picture. Normally, it is much more yellow. When I wake up in the morning, my mouth smells very bad. This problem makes me feel very embarrassed while talking to others. I would like to know the cause and proper treatment.