What Is Hashimoto Thyroiditis?
Hashimoto thyroiditis is a condition that affects the thyroid gland, a small gland in the front of the neck that helps control metabolism, energy, and body temperature. In Hashimoto thyroiditis, the immune system mistakenly attacks the thyroid, causing inflammation and damage over time.
As the thyroid becomes less able to make hormones, many people develop hypothyroidism, also called an underactive thyroid. This can slow down many of the body’s normal functions.
The exact cause is not fully understood, but Hashimoto thyroiditis is an autoimmune disease. Risk factors include:
- Being female
- Family history of thyroid disease
- Other autoimmune conditions
- Middle age
- Hormonal changes related to pregnancy
Symptoms
Hashimoto thyroiditis symptoms often develop slowly and may become more noticeable over time. Some people have mild symptoms at first, while others experience more significant changes.
Common symptoms may include:
- Feeling tired or low on energy
- Weight gain
- Sensitivity to cold
- Constipation
- Dry skin or thinning hair
- Muscle aches or weakness
- Joint pain
- Depression or difficulty concentrating
- Swelling in the neck from an enlarged thyroid (goiter)
In some cases, people may briefly experience symptoms linked to increased thyroid hormone levels before the thyroid slows down. These symptoms can include anxiety, sweating, tremors, or a rapid heartbeat.
How Is It Diagnosed?
Healthcare providers diagnose Hashimoto thyroiditis using a combination of medical history, physical examination, and blood tests. Testing often includes measuring thyroid hormone levels and checking for thyroid antibodies that suggest autoimmune thyroid disease.
If the thyroid gland is enlarged or nodules are present, imaging tests such as a thyroid ultrasound may also be recommended.
How Is It Treated?
Treatment depends on how well the thyroid is functioning and whether symptoms are present.
If thyroid hormone levels remain normal, careful monitoring may be all that is needed. When hypothyroidism develops, treatment usually involves daily thyroid hormone replacement medication. This medicine helps restore normal hormone levels and can improve symptoms such as fatigue, weight gain, and cold intolerance.
Providers may adjust medication over time based on blood test results. Regular follow-up visits are important to keep thyroid levels balanced.
Surgery is not common, but it may be considered if a large goiter causes trouble swallowing, breathing, or speaking.
Most people with Hashimoto thyroiditis are able to manage the condition successfully with long-term care and medication.
