If the leukorrhea is like water and has a fishy smell, the most common reasons are as follows: first, the most common is caused by bacterial vaginosis, when the vaginal flora imbalance, it is easy to lead to anaerobic bacterial infections, resulting in bacterial vaginosis, bacterial vaginosis, the main characteristics of the leukorrhea is relatively thin, the amount of leukorrhea is relatively large, there is a very big fishy smell, in the clinic to be given treatment. Secondly, we should exclude the possibility of cervical cancer and endometrial cancer, in this case, the discharge is similar to slop, and the discharge has a great bad smell, accompanied by the discharge of blood, it is recommended to do gynecological examination and ultrasound to exclude the possibility of cervical cancer and endometrial cancer once the above mentioned symptoms appear.