Bitter mouth, dry mouth and bad breath are caused by damp-heat in your liver and gallbladder and excessive stomach fire. I suggest you take Miao medicine.

Yang Yin Portsmouth Xiang Ye

2 boxes are a course of treatment.

That medicine is very effective.

I have seen examples of people with bad breath recovering after eating for many years.

Longdan Xiegan Tablet or Xiaoyan Lidan Tablet

Watch it while eating.

^_^