Notice unexplained changes in your metabolism? It may be time to check your thyroid.

If you've ever wondered why your energy suddenly drops or your weight seems to change even when your habits stay the same, your thyroid may be playing a bigger role than you think. This small, butterfly-shaped gland sits in the front of your neck, yet it helps control some of the most important functions in your body.

How Your Thyroid Affects Your Health

Your thyroid's main job is to produce hormones that regulate your metabolism. Metabolism is the process that turns the food you eat into the energy you use. When everything is working well, you usually feel good. But when your thyroid makes too much or too little of these hormones, your body can feel out of sync.

If your thyroid is underactive, which is called hypothyroidism, your metabolism slows down. This can make you feel tired even after a full night of sleep. You may notice weight gain, dry skin, feeling cold, hair loss or trouble concentrating. Some people describe it as feeling "slowed down" both mentally and physically.

On the other hand, if your thyroid is overactive, called hyperthyroidism, your metabolism speeds up. This can lead to sudden weight loss, a fast heartbeat, anxiety, sweating or trouble sleeping. It may feel like your body is running on overdrive.

Thyroid problems can affect more than just energy and weight. They can also impact your heart, digestion, mood and even your menstrual cycle. Because these symptoms can look like other health issues, many people don't realize their thyroid is the problem. That's why it helps to know the signs that something may be off.

Signs That Your Thyroid Isn't Working Right

Common symptoms of a thyroid issue include unexplained weight changes, fatigue, sensitivity to cold or heat, changes in heart rate, muscle weakness and changes in your hair, skin or nails. You may also notice mood changes like feeling down or more irritable than usual. While not every symptom points to a thyroid problem, it's worth talking with your doctor if you notice several of these changes at the same time.

Treating and Preventing Thyroid Issues

The good news is that thyroid conditions are very treatable. A simple blood test can check your hormone levels and give your doctor a clear picture of how your thyroid is working. Treatment usually includes medication that helps bring your hormone levels back to normal. Many people start to feel better within weeks once they get the right treatment.

There are also steps you can take to support your thyroid health. Eating a balanced diet with enough iodine, selenium and zinc can help keep your thyroid working properly. These nutrients are found in foods like seafood, eggs, nuts and beans. Staying active, managing stress and getting enough sleep also help support your overall hormone balance. While these habits won't cure a thyroid condition, they can help you feel your best.

Your thyroid may be small, but it has a big impact on how you feel each day. Paying attention to changes in your energy, weight and mood can help you catch problems early. If something doesn't feel right, trust your instincts and talk with your healthcare provider.

Speak with a Specialist 

Caring for adults and children, Guthrie Endocrinology specializes in treating disorders of the endocrine system which regulates your mood, growth and development, tissue function, and metabolism, as well as sexual function and reproductive processes. 

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^{Date Last Reviewed: November 19, 2025}

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