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Published on: 3/5/2025

What Could Cause Someone to Have 3 Periods in a Month?

Having three periods in one month might happen due to unusual changes in your hormones that make your cycle shorter or cause extra bleeding.

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Explanation

Sometimes, you might notice more bleeding days than usual, and it can seem like you’re having three periods in one month. This can happen because your hormones, which control your period, might be acting in a way that causes your body to shed the lining of your uterus more than once. For example, if your menstrual cycle becomes very short, you might start a new cycle while still finishing the previous one. Other times, you might experience extra bleeding or spotting between periods, making it appear like a full period has restarted. Factors like stress, sudden changes in weight, intense exercise, or even the way your body reacts to birth control can change your hormone levels. Sometimes, medical conditions like polycystic ovary syndrome (PCOS) or thyroid issues can also lead to such irregularities. While this might not always be a concern, if you notice this pattern happening often, for more than 3 months, or if you have other symptoms such as significantly increased pain, bleeding, or dozziness when standing, it could be a good idea to talk with a healthcare provider to check your hormone levels and overall health.

(References)

  • Jukic AM. Challenges and future directions in menstrual cycle research. Paediatr Perinat Epidemiol. 2020 May;34(3):328-330. doi: 10.1111/ppe.12664. Epub 2020 Mar 12. PMID: 32166805; PMCID: PMC7192772.

  • Riaz Y, Parekh U. Oligomenorrhea. [Updated 2023 Jul 31]. In: StatPearls [Internet].

  • Thiyagarajan DK, Basit H, Jeanmonod R. Physiology, Menstrual Cycle. [Updated 2024 Sep 27]. In: StatPearls [Internet].

  • Song S, Choi H, Pang Y, Kim O, Park HY. Factors associated with regularity and length of menstrual cycle: Korea Nurses' Health Study. BMC Womens Health. 2022 Sep 1;22(1):361. doi: 10.1186/s12905-022-01947-z. PMID: 36050702; PMCID: PMC9438137.

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