If there is a large amount of watery vaginal discharge, it is commonly found in the following diseases clinically: 1. If there is no odor in the water flowed, the possibility of cancer of the fallopian tubes should be excluded. If the discharge is similar to slop, clinically it may be caused by endometrial cancer, and the discharge is often accompanied by a strong foul smell. It is often caused by endometrial cancer combined with infection, and it is recommended to do diagnostic scraping if echogenicity of endometrium is found through ultrasound examination, and the diagnosis can be made through pathological examination. 3. Endometrial cancer is often caused by watery vaginal discharge with blood, and this discharge often has foul odor, which is mainly caused by necrosis of cancerous tissue.