The main reason for vaginal discharge showing green bean residue is mycosis vaginalis, caused by infection with pseudomonal yeast. All women’s vagina contains pseudomonal yeast, but when lactic acid bacteria are in advantage, it does not cause symptoms. The common causes are: 1. long-term application of antibiotics makes the flora dysbiosis, and the yeast will multiply and multiply. 2. pregnancy and diabetes, the body’s immunity decreases, which is conducive to the growth of pseudomonal yeast. 3. a large number of applications of immunosuppressants, the body’s resistance decreases. 4. endogenous infection of Pseudomonas in the intestinal tract. 5. wearing tight fitting chemical fiber underwear and obesity are also causes of Pseudomonas reproduction and mycosis vaginalis.