When you feel constantly exhausted, anxious, or low, it is natural to assume the cause is purely psychological. However, mental health professionals are increasingly trained to look beyond emotional triggers to physical ones. One of the most common physical culprits that mimics mental illness is thyroid dysfunction.
According to Manpreet Lehal, a psychotherapist at Wake Counseling, distinguishing between clinical depression and medical issues is a critical first step in therapy. “If somebody is having issues with their thyroid functioning, that can mimic depression-like symptoms, but it may not be true clinical depression,” Lehal explains. This distinction is vital because standard therapy alone may not resolve symptoms if the root cause is a hormonal imbalance.
The Hidden Link Between Thyroid Function and Mental Health
The thyroid is a butterfly-shaped gland in the neck that produces hormones (T3 and T4) responsible for regulating metabolism. These hormones also play a significant role in brain function. When the thyroid is underactive (hypothyroidism), it fails to produce enough hormones to meet the body’s needs.
Research confirms a direct biological link between low thyroid function and mood disorders. Thyroid hormones regulate neurotransmitters like serotonin and dopamine, which are the chemicals in your brain that boost mood and motivation. When thyroid levels drop, these neurotransmitters can become unbalanced, leading to severe changes in mental health.
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Depression: Studies show that up to 60% of patients with hypothyroidism experience some degree of depression.
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Anxiety: While often associated with hyperthyroidism (overactive thyroid), anxiety is also a surprisingly common symptom of an underactive thyroid. Approximately 40% of people with new hypothyroidism report symptoms of anxiety.
Common Symptoms: Is it Your Thyroid or Depression?
Because the symptoms of hypothyroidism and depression overlap so heavily, misdiagnosis is common. Patients may spend months or years in therapy or on antidepressants without seeing improvement because the underlying hormonal issue remains untreated.
The following table compares symptoms that are shared between the two conditions versus those that might point specifically to a thyroid issue.
|
Shared Symptoms (Mental & Physical) |
Specific Signs of Hypothyroidism |
|---|---|
|
Chronic fatigue and lethargy |
Sensitivity to cold temperatures |
|
Brain fog and difficulty concentrating |
Unexplained weight gain or difficulty losing weight |
|
Lack of motivation |
Dry skin and brittle hair/nails |
|
Anxiety and restlessness |
Hair loss (especially eyebrows) |
|
Sleep disturbances (insomnia or oversleeping) |
Muscle weakness and joint pain |
“They will be tired all the time, they can’t get out of bed… medication is needed so they can actually have the energy to do some of the things being recommended during the therapy process.” – Manpreet Lehal, Wake Counseling
Why Medical Evaluations Are Critical Before Therapy
Before starting a treatment plan for depression or anxiety, it is essential to rule out medical causes. Lehal notes that in her practice, they routinely ask clients if they have had recent lab work done. “We try to rule out whether there’s any medical issues going on that might be triggering symptoms,” she says.
Beyond the thyroid, other physical deficiencies can also mimic mental health struggles:
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Vitamin D Deficiency: Lehal highlights Vitamin D as a “big culprit” that can mimic depression. Research supports this, showing a correlation between low Vitamin D levels and clinically significant depression symptoms.
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Hormonal Changes in Women: Women are significantly more likely to develop thyroid issues than men, with estimates suggesting they are 5 to 8 times more at risk. Lehal points out that hormonal shifts during pregnancy and postpartum are frequent triggers for these symptoms.
Managing Mental Health When You Have Thyroid Issues
If you are diagnosed with hypothyroidism, the primary treatment is typically hormone replacement medication, such as levothyroxine, which can often resolve the mood-related symptoms. However, lifestyle changes play a supportive role in recovery.
Based on clinical experience and general health guidelines, the following strategies can help manage symptoms:
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Medication Adherence: “First of all, adjusting or helping a client get to a functioning level” with medication is often necessary before they have the energy for therapy, says Lehal.
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Regular Exercise: Physical activity can help boost energy levels and metabolism, which are often sluggish in hypothyroid patients.
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Dietary Adjustments: While individual needs vary, some patients find relief through specific dietary changes. Lehal shares that going gluten-free personally helped her energy levels and thyroid function, though patients should consult a doctor before making major dietary changes.
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Supplements: Ensuring adequate intake of Vitamin D and Omega-3s (fish oil) can support brain health and mood regulation.
Conclusion
If you are struggling with anxiety or depression that doesn’t seem to respond to traditional therapy or coping skills, it may be time to look at your physical health. Hypothyroidism is a treatable medical condition that, once managed, often leads to significant improvements in mental well-being. Always consult with a primary care physician to run a full thyroid panel (TSH, T3, and T4) to ensure you are treating the root cause of your symptoms.