"Underactive thyroid and thinning hair" refers to the condition in which the thyroid gland does not produce enough thyroid hormone, leading to hair loss. The thyroid gland is a small, butterfly-shaped gland located in the neck. It produces hormones that regulate metabolism, growth, and development. When the thyroid gland does not produce enough of these hormones, it can lead to a number of health problems, including hair loss.
Hair loss is a common symptom of hypothyroidism, or underactive thyroid. This is because thyroid hormones are necessary for the growth and maintenance of healthy hair. When thyroid hormone levels are low, hair follicles can become weak and hair may become thinner and more brittle. In addition, hypothyroidism can also lead to other symptoms, such as fatigue, weight gain, and constipation.
