Abnormal Vaginal Bleeding and Cancer – Verywell Health

Uterine and endometrial cancer both cause heavy vaginal bleeding. Sudden, heavy vaginal bleeding that soaks at least one pad every hour for 24 hours needs to be reported to a physician immediately. Bleeding between periods: Heavy spotting or an additional cycle in a month that occurs for more than two cycles should be evaluated by a doctor.

https://www.verywellhealth.com/cancer-symptoms-abnormal-vaginal-bleeding-513761