what cause a female to bleed 18 days after menstruation ?

Almost all women have some

Almost all women have some spotting occasionally during their menstrual cycle. A common reason is not taking birth control pills consistently.

Here are some other possible reasons:
Hormonal fluctuations
Beginning or stopping oral contraceptives or estrogens
Low thyroid levels
IUDs occasionally cause slight spotting
Injury to the vagina from insertion of objects, from malignant cancers, or from vaginal infections
Certain drugs such as anticoagulants Vaginal dryness
GYN procedures such as CONE biopsy or cervical cauterization

If you have concerns, talk to your physician.


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