If you’ve been noticing more hair in your brush or thinning patches on your scalp, it can be a worrying experience. You might be wondering if an underlying health issue is to blame. For many people, the answer lies in a small butterfly-shaped gland in the neck: the thyroid. When this gland is underactive, a condition known as hypothyroidism, it can indeed have a direct impact on your hair’s health and growth cycle.
How Your Thyroid Affects Hair Growth
Think of your thyroid as your body’s master metabolic regulator. It produces hormones that control everything from your energy levels to your heart rate—and yes, even the growth of your hair. These hormones are essential for driving the activity in your hair follicles. When thyroid hormone levels are too low, as in hypothyroidism, it disrupts the normal hair growth cycle. This pushes a larger number of hairs into the resting phase prematurely, leading to a condition called telogen effluvium. The result is a noticeable, and often diffuse, shedding of hair.
Recognizing Hypothyroidism-Related Hair Loss
The hair loss from an underactive thyroid doesn’t always look the same for everyone, but there are some common signs. It often appears as a general thinning all over the scalp, rather than a receding hairline or distinct bald spots. You might also notice that the hair on the outer edge of your eyebrows is thinning. Beyond hair changes, other symptoms can include feeling unusually tired, gaining weight, having dry skin, and feeling cold more often. If you’re experiencing a combination of these issues, it’s a good idea to talk to your doctor.
Caring for Your Hair and Restoring Health
The most important step you can take is to get a proper diagnosis and treatment. A simple blood test can check your thyroid levels. If hypothyroidism is confirmed, your doctor will likely prescribe thyroid hormone replacement medication. This is the most effective way to address the root cause. As your hormone levels stabilize with treatment, your hair growth cycle should gradually return to normal, though this can take several months.
In the meantime, be gentle with your hair. Avoid harsh chemical treatments, high-heat styling, and tight hairstyles that pull on the roots. Using a gentle, moisturizing shampoo and a wide-tooth comb can help minimize breakage. Eating a balanced diet rich in iron, zinc, and vitamin D also supports overall hair health from the inside out.
While hypothyroidism is a common culprit for hair loss, it’s important to remember that it is a treatable condition. By working with your healthcare provider and practicing gentle hair care, you can support your body’s natural healing process and look forward to healthier hair in the future.