The 70-year-old man suddenly found trace blood in the vagina to consider with gynecological inflammation, cervical precancerous lesions and cervical cancer, polyps, endometrial cancer and so on. 1. Gynecological inflammation: if the patient is combined with excessive leukorrhea, vulvar itching, burning sensation in the vagina and other discomforts, we should be alert to the occurrence of vaginitis, pelvic inflammatory disease, due to inflammation stimulation of local tissues leading to increased vascular permeability will have a small amount of bleeding and other manifestations. 2. Cervical lesions: if the patients are combined with human papillomavirus infection, then we should be alert to the occurrence of cervical precancerous lesions and cervical cancer, some patients with irregular vaginal bleeding as the main manifestation. 3. Polyps: for patients with endometrial polyps and cervical polyps, a small amount of vaginal bleeding is the main manifestation. 4. Malignant tumor: for patients with endometrial cancer, due to the rapid growth of cancerous tissues, invasion of local blood vessels will lead to vaginal bleeding. For 70-year-olds who suddenly find a trace of blood in the vagina, it is recommended that they go to the gynecology department of regular hospitals to improve ultrasound, cervical cancer screening and other examinations, so as to clarify the cause of the disease and then actively treat it under the guidance of doctors.