The yellow water below without odor and without itching may be caused by endometritis, cervical nuchal cyst, cervical intraepithelial neoplasia, fallopian tube cancer, endometrial cancer and other diseases. 1. endometritis: the yellow water below without odor and without itching may be caused by endometritis, usually seen in the early stage of infection, and may also be accompanied by lower abdominal pain, fever and other symptoms. Generally, antibiotic treatment is the main treatment, and pus drainage is feasible in serious cases, along with proper rest and attention to sexual hygiene; 2. Cervical nuchal cysts: cysts formed by impaired drainage of cervical glandular secretions, and huge cysts that rupture on their own can appear as yellow water flowing from the vagina, generally without odor or itching. Physiological cysts usually do not require treatment, while smaller pathological cysts can be treated with physical therapy such as laser and freezing, and huge pathological cysts can be treated with surgery such as cervical glandular cystostomy; 3. Cervical intraepithelial neoplasia: often without special symptoms, occasionally with increased vaginal discharge, with or without odor. If the lesion persists, cold knife conization of the cervix is feasible. High-grade endometrioma may develop into invasive cancer and needs active treatment, such as local hysterectomy or total hysterectomy. 4. Fallopian tube cancer: vaginal discharge is plasma yellow water, the amount may be more or less, sometimes bloody, usually odorless and not itchy. Treatment is mainly based on surgery, supplemented by chemotherapy and radiotherapy, with postoperative rest and regular review; 5.Endometrial cancer: the main symptom is abnormal vaginal bleeding, which can be a small amount of plasma or bloody discharge in early stage, usually without odor. Treatment is mainly surgical treatment, such as radical hysterectomy plus bilateral tubal and ovarian resection.