What happens if you have sex without knowing that your period has started?

Having intercourse without knowing that menstruation has started can lead to menstrual irregularities, abdominal pain, vaginal infections such as vaginitis, and other harms. Intercourse during menstruation poses significant risks, and if discomfort occurs, timely treatment is necessary. Specific analyses are as follows:

1. Menstrual Irregularities

Intercourse during the menstrual period may stimulate increased uterine contractions and worsen pelvic congestion, leading to excessive menstrual bleeding or prolonged spotting.

2. Abdominal Pain

During menstruation, intercourse can accelerate uterine contractions and easily lead to secondary intrauterine infection, causing significant abdominal pain and lower backache.

3. Vaginal Infection (Vaginitis)

The body's resistance is lower during menstruation. Intercourse can introduce pathogenic bacteria into the vagina, and menstrual blood provides a favorable environment for bacterial growth, making it easier to develop vaginitis. This may result in symptoms such as vaginal itching, unpleasant odor, and abnormal discharge.

In addition to the above, intercourse during menstruation may also lead to pelvic inflammatory disease, endometriosis, infertility, and other complications. Sexual intercourse should be strictly avoided during menstruation. If intercourse occurs accidentally, it is recommended to take medications such as levofloxacin capsules, metronidazole tablets, and amoxicillin capsules under a doctor's guidance to prevent infection.