Menstruation that is like snot and very light may be caused by endometritis, uterine adhesions and cervical polyps. 1. Endometritis: Inflammatory endometrium will ooze out a lot of inflammatory secretions, which will also stimulate the local mucous membrane to break and bleed. When the viscous inflammatory secretion mixes with blood and is discharged through the vagina, the patient may mistake it for menstruation, and the menstruation will be like snot, with a small amount. 2. Uterine adhesions: When the uterine cavity develops adhesions, it can lead to poor menstrual discharge and low volume, and if the menstruation mixes with the sticky secretions in the uterine cavity where the adhesions have occurred, the menstruation will be snot-like. 3. Cervical polyps: If the cervical polyp is stimulated by external stimuli, its surface may break and bleed, and when the blood passes through the vagina and is discharged from the body and mixes with the vaginal secretion, it may be snot-like. Patients who have snot-like menstrual periods with a small amount of blood should consult a doctor to find out the cause.