After menstruation, the most common reason for constant yellow water is caused by vaginal inflammation. You can do routine tests for leukorrhea to find out if there is any pathogenic bacterial infection, and then decide whether treatment is needed based on the results. It is also necessary to find out whether there is any cancer in the cervix, and whether there are any abnormalities in the endometrium and fallopian tubes, all of which require ultrasound to give further information, as well as screening for cervical cancer. If the yellow water comes out on its own without conscious effort, it is also important to rule out whether the urine is coming out due to vesicovaginal fistula. If this is the case, prompt repair surgery is recommended.