Thyroid Dysfunction – Signs, Symptoms, and What to Do

The thyroid gland is an essential endocrine gland located in the human neck.

Your thyroid might be small, but it has a big job. This butterfly-shaped gland in your neck produces hormones that regulate metabolism, energy, mood, digestion, and even your hair and skin health. When your thyroid isn’t working properly, it can affect nearly every system in your body—but the signs can be subtle and often overlooked.

Common Signs and Symptoms

Thyroid dysfunction can present in many ways, depending on whether it’s under active (hypothyroidism) or overactive (hyperthyroidism). Some common symptoms include:

Hypothyroidism (Underactive Thyroid)

• Persistent fatigue or low energy

• Weight gain despite healthy habits

• Feeling cold when others are comfortable

• Hair thinning, brittle nails, or dry skin

• Brain fog, poor memory, or difficulty concentrating

• Constipation

Hyperthyroidism (Overactive Thyroid)

• Unexplained weight loss

• Rapid heartbeat or palpitations

• Feeling anxious, irritable, or jittery

• Trouble sleeping

• Frequent bowel movements

• Muscle weakness

Even subtle shifts in mood, energy, or digestion could hint at a thyroid imbalance, which is why paying attention to early signs is so important.

What to Do If You Suspect a Thyroid Issue

• Track your symptoms: Keep a simple log of energy levels, sleep, digestion, mood, and hair/skin changes. Patterns can help guide your healthcare provider.

• Check labs: Functional medicine takes a deeper look at thyroid health beyond standard TSH testing. This may include T3, T4, reverse T3, thyroid antibodies, and nutrient markers like iodine, selenium, and vitamin D.

• Evaluate lifestyle factors: Stress, sleep, diet, and environmental toxins can all impact thyroid function. Optimizing these areas can support thyroid health.

• Work with a functional medicine provider: We focus on uncovering the root cause of thyroid dysfunction, rather than just managing symptoms. Treatment may include targeted nutrition, lifestyle interventions, and, if necessary, medication support.

The Takeaway

Thyroid dysfunction can quietly impact your energy, metabolism, and overall wellbeing. Early recognition and a proactive approach can help you regain balance and prevent long-term complications. If you’ve noticed any of the symptoms above, it may be time to get your thyroid checked—and not just for TSH. A comprehensive functional medicine assessment can reveal what’s really going on and guide a personalized plan to restore your health.

Next Step: If you suspect a thyroid imbalance, schedule a consultation to review your symptoms, labs, and lifestyle factors. The sooner you address it, the better your results.

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