Heavy periods are one of the more common hypothyroidism symptoms.1
The thyroid gland affects the metabolic function of virtually every organ in the body.1 An underactive thyroid
gland produces less T3 (triiodothyronine) and T4 (thyroxine) hormones.2
A decline in T3 and T4 impacts the production of the hormones that control the menstrual cycle. When
menstruation occurs, women with hypothyroidism may experience greater blood loss.3
If you are experiencing heavy periods, it may be a symptom of hypothyroidism. Speak to your doctor about
arranging a thyroid test.
References:
1. John JD, Damodaran V, Radhakrishnan S. Assessment of thyroid and prolactin levels among the women with abnormal uterine bleeding. Int J Reprod Contracept
Obstet Gynecol. 2017;6(6):2547-2552. 2. Pirahanchi Y, Toro F, Jialal I. Physiology, thyroid stimulating hormone. In: StatPearls. National Library of Medicine;
2023. 3. Shomon M. How thyroid function affects menstruation. Verywell Health. Accessed May 25, 2023. https://www.verywellhealth.com/menstrual-problems-and-thyroid-disease-3231765
