“Hypo” means low or under what is normal, whereas “hyper” means high or above what is normal.1
Hypothyroidism means the thyroid is underactive and hyperthyroidism means the thyroid is overactive.2
References:
1. Difference between hypo and hyper. Differencebetween.com. Accessed May 25, 2023. https://www.differencebetween.com/difference-between-hypo-and-vs-hyper/ 2. Shomon M. How thyroid function affects menstruation. Verywell Health. Accessed May 25, 2023. https://www.verywellhealth.com/menstrual-problems-and-thyroid-disease-3231765
