Hashimoto’s Thyroiditis is an autoimmune disease in which the immune system mistakenly attacks the thyroid gland, causing chronic inflammation that can gradually reduce the thyroid’s ability to produce thyroid hormones. It is the most common cause of hypothyroidism (underactive thyroid) in the United States and is typically managed with ongoing monitoring and medication.
Why Patients Ask This Question
Many people first hear about Hashimoto’s thyroiditis after experiencing symptoms such as:
- Persistent fatigue
- Weight gain despite healthy habits
- Brain fog or difficulty concentrating
- Hair thinning
- Dry skin
- Constipation
- Cold hands and feet
- Depression or mood changes
- Heavy or irregular menstrual periods
Others discover they have Hashimoto’s when routine blood work reveals elevated thyroid antibodies, with or without abnormal thyroid function, even before symptoms develop. Because these symptoms overlap with other medical conditions, patients often wonder whether their thyroid could be contributing to how they feel.
What Is Hashimoto’s Thyroiditis?
Hashimoto’s thyroiditis, also known as Hashimoto’s disease, chronic autoimmune thyroiditis, or chronic lymphocytic thyroiditis, is an autoimmune disorder.
Normally, your immune system protects your body from infections. In Hashimoto’s disease, however, immune cells mistakenly attack healthy thyroid tissue. Over time, this ongoing inflammation damages thyroid cells and reduces the gland’s ability to produce thyroid hormones.
Thyroid hormones regulate metabolism, energy production, heart function, body temperature, digestion, menstrual cycles, and many other body systems. As thyroid hormone production declines, symptoms of hypothyroidism may develop.
What Most Patients Experience
Every patient may experience Hashimoto’s differently. During consultations, many patients report that they simply “don’t feel like themselves.” The symptoms often develop gradually over months or even years, making them easy to dismiss such as aging, stress, menopause, or a busy lifestyle.
Common experiences include:
- Constant fatigue despite adequate sleep
- Difficulty losing weight
- Brain fog or poor concentration
- Increased sensitivity to cold
- Dry skin and brittle nails
- Hair thinning or increased shedding
- Mood changes
Some patients have Hashimoto’s with normal thyroid hormone levels but test positive for thyroid antibodies (called euthyroid Hashimoto’s) and have few or no symptoms. Others experience progressive hypothyroidism requiring lifelong treatment. A small number of people may experience a brief period of excess thyroid hormone release (“Hashitoxicosis”) early in the disease before thyroid function declines. This brief period of excess thyroid hormones can cause symptoms such as rapid heart rate, anxiety, jitteriness, insomnia, and weight loss.
How Is Hashimoto’s Diagnosed?
Diagnosis usually involves a combination of:
Medical history and physical examination
Your healthcare provider will discuss symptoms, family history, medications, and palpation of the thyroid gland.
Blood tests
The most commonly ordered thyroid tests include:
- Thyroid-stimulating hormone (TSH)
- Free T4, Free T3
- Reverse T3
- Thyroid peroxidase (TPO) antibodies
- Thyroglobulin (Tg) antibodies
Elevated TPO antibodies and/or Thyroglobulin antibodies can indicate the diagnosis of Hashimoto’s Thyroiditis. All levels should be evaluated and diagnosed by your healthcare provider.
An ultrasound may be recommended if your thyroid feels enlarged, contains nodules, or if additional evaluation is needed. It is not required for every patient.
Factors That Affect the Answer
Hashimoto’s disease does not progress at the same rate for everyone.
Factors that may influence progression include:
- Family history of autoimmune disease
- Female sex
- Increasing age
- Pregnancy and the postpartum period
- Other autoimmune conditions such as type 1 diabetes, celiac disease, lupus, or rheumatoid arthritis
- Excess iodine intake in susceptible individuals
- Environmental and genetic factors
Some patients maintain normal thyroid function for years, while others gradually develop hypothyroidism requiring medication.
How Is Hashimoto’s Treated?
Treatment depends on whether thyroid hormone levels remain normal, and what may appear on their thyroid ultrasound.
If thyroid function is normal
Not everyone with Hashimoto’s immediately needs medication. If antibodies come back abnormal, thyroid function appears normal, and symptoms are not present; medication may not be needed.
Instead, your provider may recommend:
- Periodic thyroid blood tests
- Monitoring for symptom changes
- Regular follow-up visits
If hypothyroidism develops
When Hashimoto’s disease causes enough damage to the thyroid that it can no longer produce adequate thyroid hormones, medication can become necessary. Most patients require long-term and often lifelong treatment.
Depending on your individual needs, treatment options may include:
- Levothyroxine (T4): The FDA-approved standard treatment for hypothyroidism that replaces thyroxine (T4) and restores normal thyroid hormone levels.
- Cytomel (T3): Cytomel is made in the laboratory and is a form of the thyroid hormone triiodthyronine (T3).
- NP Thyroid®: A natural animal derived thyroid medication containing both T4 and T3 hormones that may be appropriate for select patients.
- Armour® Thyroid: Another natural animal derived thyroid medication that provides both T4 and T3 and may be considered based on symptoms, laboratory results, and patient preference.
Your medication dose may need to be adjusted over time based on:
- Blood test results
- Symptoms
- Age
- Pregnancy
- Weight changes
- Other medical conditions
In addition to thyroid hormone replacement, we also focus on supporting overall thyroid health by:
- Thyroid Support Complex – contains Vitamins A, C, D3, Zinc, Selenium, L-Tyrosine, Ashwagandha, and other nutrients that support healthy thyroid function
- Replace specific vitamin deficiencies (Vitamin D, B12, Iron, etc.)
- Support mitochondrial health with NAD+ (IM injections or patches)
- Focus on gut health (GI map or peptide therapy)
What Providers Want Patients to Know
Hashimoto’s Thyroiditis is highly treatable, but treatment involves more than simply writing a prescription.
An experienced provider will:
- Confirm the diagnosis with appropriate blood work
- Evaluate whether symptoms are related to thyroid function
- Monitor thyroid hormone and antibody levels over time
- Adjust medication carefully based on blood work results and clinical symptoms
- Consider other possible contributors to fatigue, weight changes, or hormone-related symptoms
- Recommend diet changes, or adding in supplements
Many patients are surprised to learn that thyroid treatments can correct hypothyroidism but do not “cure” the underlying autoimmune condition. Regular follow-up remains important because thyroid hormone requirements may change over time.
Risks or Considerations
When left untreated, hypothyroidism caused by Hashimoto’s disease can contribute to several health complications, including:
- Elevated LDL (“bad”) cholesterol
- Increased cardiovascular risk
- Goiter (enlarged thyroid)
- Fertility problems
- Pregnancy complications
- Peripheral neuropathy
- Rarely, severe untreated hypothyroidism can progress to myxedema coma, a medical emergency.
Treatment considerations include:
- Thyroid medication works best when taken consistently, usually on an empty stomach.
- Iron, calcium, certain antacids, soy products, and high-fiber foods can interfere with medication absorption if taken too close together.
- Taking too much thyroid medication can increase the risk of atrial fibrillation and bone loss (osteoporosis), which is why regular monitoring is essential.
Schedule a consultation to discuss thyroid health with one of our providers.
Related Questions
Can Hashimoto’s Thyroiditis be cured?
Currently, there is no cure for Hashimoto’s thyroiditis. However, hypothyroidism resulting from the condition can usually be managed effectively with thyroid hormone replacement with an experienced medical provider and regular monitoring.
Is Hashimoto’s the same as hypothyroidism?
No. Hashimoto’s is an autoimmune disease that can lead to hypothyroidism. Some people have Hashimoto’s with normal thyroid function for years before hypothyroidism develops.
Does Hashimoto’s always require medication?
Not necessarily. Patients with normal thyroid hormone levels and no symptoms may only require periodic monitoring. Medication is typically recommended when hypothyroidism develops or thyroid hormone levels become abnormal any symptoms occur.
Can diet cure Hashimoto’s?
No scientifically proven diet has been shown to cure Hashimoto’s thyroiditis. There is some evidence that limiting or removing dairy, gluten, and soy could benefit the patient. However, dietary changes alone should not replace evidence-based medical evaluation and treatment. Patients should discuss supplements, including iodine, with their healthcare provider because excessive iodine intake may worsen autoimmune thyroid disease in susceptible individuals.
Is Hashimoto’s hereditary?
Genetics play a significant role. Having a family history of Hashimoto’s disease or other autoimmune disorders increases your risk, although not everyone with a family history develops the condition.
Final Takeaway
Hashimoto’s Thyroiditis is the most common cause of hypothyroidism in the United States and results from the immune system gradually damaging the thyroid gland. Although the autoimmune process cannot currently be reversed, most patients can successfully manage the condition through regular monitoring, individualized treatment when needed, and ongoing care with a qualified healthcare provider. If you’re experiencing persistent fatigue, unexplained weight changes, hair thinning, or other symptoms suggestive of thyroid dysfunction, a comprehensive thyroid evaluation can help determine whether Hashimoto’s disease or another condition is contributing to your symptoms.
Disclaimer: All content including but not limited to, text, graphics, images and other material posted on this website is for informational purposes only. No material on this website is designed to substitute or provide any medical advice. Always seek the advice of your physician or other qualified health care provider with any questions you may have regarding a medical condition or treatment. We do not provide emergency medical services.
Medical Sources Reviewed
- Mayo Clinic. Hashimoto’s Disease – Symptoms & Causes.
- Mayo Clinic. Hashimoto’s Disease – Diagnosis & Treatment.
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Hypothyroidism (Underactive Thyroid).
- American Thyroid Association. Hashimoto’s Thyroiditis.
- Klubo-Gwiezdzinska J, Wartofsky L. Hashimoto thyroiditis: an evidence-based guide to etiology, diagnosis and treatment. Polish Archives of Internal Medicine. 2022.
- Martinez Quintero B, Yazbeck C, Sweeney LB. Thyroiditis: Evaluation and Treatment. American Family Physician. 2021.
- Cleveland Clinic. What is a thyroid ultrasound?
Authored by Jessica Dayton, FNP
