why am i bleeding on the pill

Bleeding while on the pill, often called breakthrough bleeding or spotting, is a common side effect, especially in the first few months of use. It happens because the hormones in the pill cause changes in the uterine lining, making it thinner and less stable, which can lead to unexpected bleeding. Other reasons include missing pills, changing pill types or doses, taking low-dose estrogen pills, or using extended-cycle or continuous-use pill regimens. This bleeding is usually lighter than a normal period and is generally not harmful. If the bleeding is heavy, prolonged, or accompanied by other symptoms, it is best to consult a healthcare provider. Missing pills or not taking them at the same time daily can increase the likelihood of bleeding and reduce contraceptive effectiveness. Emergency contraception can also cause spotting due to hormone changes. In summary, bleeding on the pill is typically due to hormonal adjustments, missed doses, or specific pill types, and it usually improves within a few months without indicating a serious problem.