What causes blood streaks to suddenly appear in vaginal discharge?

Nov 23, 2022 Source: Cainiu Health
Disease description:

This morning when I woke up, I suddenly noticed a small amount of blood in my vaginal discharge. I'm a bit worried that it might indicate internal bleeding, so I'd like to ask—what could be the reason for suddenly having blood-tinged discharge?

Doctor's answer (1)
Dr. Cao Ting
Blood streaks suddenly appearing in vaginal discharge may be due to being in the ovulation phase, as hormonal fluctuations during ovulation can cause slight shedding of the uterine lining, resulting in blood-tinged discharge. Additionally, women in the premenstrual phase may experience increased vaginal discharge due to hormonal changes, and some may also notice blood streaks in their discharge.