If you have uterine fibroids, they put pressure on the uterine lining, which can cause more bleeding than usual. There may be a problem with the uterus’s contractions, which prevents the uterus from stopping bleeding. As a result of fibroids, blood vessels may grow, which leads to heavier or irregular periods and spotting between periods.

HORMONAL ORAL CONTRACEPTION.

Spotting is a common side effect of hormonal oral contraception, especially during the first few months of starting it. If you’re taking combined contraceptives, you may have spotting that goes away after a few months. If the spotting doesn’t go away, your pill may not be the best fit for you, and you may want to consult with your doctor and try another brand with a different formulation.

PHYSICAL CONDITIONS AND INFECTIONS.

Spotting can be caused by infections and physical changes in the reproductive tract or if you have hormonal imbalances. Physical conditions that can cause spotting include fibroids, polyps, or endometriosis.

PELVIC INFLAMMATORY DISEASE (PID).

Pelvic inflammatory disease (PID) occurs when certain pelvic infections like STIs go untreated and may lead to spotting. In addition to pain in the lower abdomen and unusual vaginal discharge, PID can cause fever. If you have spotting and other associated symptoms of PID or physical pelvic conditions, discussing this with your healthcare provider as soon as possible is important.

URINARY TRACT INFECTIONS (UTIS)

Urinary tract infections can cause bleeding from the urethra. Having pain when urinating, as well as noticing a small amount of blood while urinating, can be signs of a UTI.

SEXUAL INTERCOURSE.

It is not normal to have bleeding after sexual intercourse. In many cases, bleeding after sex can be caused by cervix or polyp issues. Some women may experience spotting after having sexual intercourse for the first time, which is normal.

Talk to your healthcare provider if you notice continuous spotting after sex.

OVULATION AND/OR HORMONAL ISSUES.

Spotting after a period can also occur around the time of ovulation. It’s unclear why some women experience ovulation bleeding while others don’t. It may mean there is a higher level of hormones.

Sources - https://www.usafibroidcenters.com/blog/why-am-i-spotting-after-my-period/

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