Generally, people with hypothyroidism will get fatter and fatter. The main pathological mechanism of hypothyroidism, i.e. hypothyroidism, is a decrease in the synthesis and secretion of thyroid hormones. The role of thyroid hormones in the maintenance of basal metabolic rate or in energy metabolism in the body is mainly in the burning of ingested calories. Therefore, patients presenting with hypothyroidism have a decreased basal metabolic rate as a result. A decrease in basal metabolic rate without a decrease in daily calories can lead to an excess of energy over time, which in turn can lead to the patient gaining weight. Patients with hypothyroidism are advised to seek timely medical attention and targeted treatment with the help of a doctor.