Yes, Hashimoto's thyroiditis (hypothyroidism) can rarely transform into Graves' disease (hyperthyroidism), a phenomenon documented in medical literature, though it's unusual because Hashimoto's usually causes irreversible thyroid damage. This shift occurs when the autoimmune response changes, possibly due to different antibodies or a recovery of thyroid function allowing for stimulation, leading to fluctuating or persistent hyperthyroidism.
Conversion of Hashimoto's thyroiditis to Graves' disease is unusual clinically and has been occasionally reported in the literature. Awareness of such a rare phenomenon is important for the physicians evaluating patients with autoimmune thyroid disorders.
The conversion of Hashimoto's thyroiditis (HT) to hyperthyroidism due to thyrotropin receptor antibodies is intriguing and considered rare. The contribution of TSH receptor blocking antibodies (TRAb), which may be stimulators (TSAb) or blockers (TBAb), is suspected.
While both produce many clinical symptoms and side effects, Graves' disease is more dangerous clinically and requires surgery in a larger percentage of patients with the disorder. Medical management of Graves' and Hashimoto's is paramount, and in some cases, all that is needed.
Although Hashimoto's thyroiditis most commonly causes hypothyroidism, in some cases, it will first cause enlargement of the thyroid gland (goiter) and temporary thyroid gland overactivity (hyperthyroidism). This is called hashitoxicosis, and it is almost always followed by development of hypothyroidism.
The 5 stages of Hashimoto's thyroiditis describe its progression from genetic susceptibility to full hypothyroidism, typically involving: 1) Genetic Risk, 2) Trigger & Antibody Production, 3) Subclinical Hypothyroidism (antibodies present, normal TSH), 4) Overt Hypothyroidism (low hormone, high TSH, symptoms appear), and 5) Advanced Stages (potential for other autoimmune issues or thyroid atrophy). While it progresses slowly, lifestyle changes can influence its advancement.
Hashimoto's disease is an autoimmune disorder. The immune system creates antibodies that attack thyroid cells as if they were bacteria, viruses or some other foreign body. The immune system wrongly enlists disease-fighting agents that damage cells and lead to cell death.
People who have Graves' disease may experience one or more of the following symptoms:
This condition can occur with other autoimmune disorders. In rare cases, thyroid cancer or thyroid lymphoma may develop. Severe untreated hypothyroidism can lead to a change in consciousness, coma, and death. This usually occurs if people get an infection, are injured, or take medicines, such as opioids.
A Hashimoto's flare-up feels like a sudden worsening of hypothyroidism symptoms, including debilitating fatigue, brain fog, muscle aches, weight gain, cold intolerance, constipation, dry skin, and depression, often described as feeling "beat up" or moving through molasses. Some people experience temporary hyperthyroid symptoms like anxiety or rapid heart rate, while others feel a general body soreness or inflammation.
Thyroidectomy is not generally recommended because the dense inflammatory process that surrounds the thyroid gland can make resection more difficult. However, patients with HT are considered for surgery if they experience persistent symptoms after conservative therapy.
Hyperthyroidism can also be caused by taking too much thyroid hormone medicine for hypothyroidism. This is called factitious hyperthyroidism. When this occurs because the prescribed dosage of hormone medicine is too high, it is called iatrogenic, or doctor-induced, hyperthyroidism. This is common.
The end stage of Hashimoto's is when your thyroid has become so irreversibly damaged that the gland atrophies and shrinks and becomes unable to produce thyroid hormone. Not everyone with Hashimoto's reaches this stage, but if you do, it means that you will rely on life-long thyroid hormone replacement medication.
It is common for individuals to develop additional autoimmune conditions following the first. Thyroid autoimmune disorders are no different. Research shows that an estimated 15 to 20 percent of those with Graves' disease develop hypothyroidism caused by subsequent Hashimoto's thyroiditis.
You may need a thyroid antibody test if you have symptoms of Hashimoto's disease or Graves' disease. But first, your provider will usually order blood tests to check your thyroid hormone levels to see if you have hyperthyroidism or hypothyroidism.
Hashimoto's Disease and Weight Gain
The metabolic slowdown associated with hypothyroidism can make it difficult for individuals to lose weight, even with reduced calorie intake.
If Hashimoto's disease leads to hypothyroidism, the go-to treatment is a medication called levothyroxine. It's a synthetic (manufactured) form of the hormone T4 that your thyroid makes. Brand names of levothyroxine include: Ermeza®.
COVID-19 can induce autoimmunity and lead to autoimmune hemolytic anemia (AIHA), Guillain‐Barré syndrome (GBS), immune thrombocytopenic purpura, and Kawasaki disease, or autoimmune thyroid diseases including Hashimoto's [1].
Hashimoto's disease tends to worsen with age because it is progressive. The disease generally progresses slowly over many years and can cause progressive damage to the thyroid glands. Additionally, it is expected that those with Hashimoto's disease will eventually get hypothyroidism, though this is not always the case.
The onset of Graves' disease symptoms is usually gradual. It often takes several weeks or months to develop. But sometimes, it develops suddenly over a few days. You may experience some of these symptoms or many at the same time.
Graves' disease and Hashimoto's thyroiditis can coexist in the same individual, reflecting their common autoimmune origin. Simultaneous occurrence of Graves' disease and Hashimoto's thyroiditis can result in clinical masking of one disorder by the other.
You may have another blood test to look for anti-thyroid antibodies. These are usually found if you have Graves' disease, a common cause of an overactive thyroid. A blood test called erythrocyte sedimentation rate (ESR) may also be done to check for inflammation in your body.
A great breakfast for Hashimoto's focuses on protein and healthy fats to keep you full and stabilize blood sugar. Options like an egg scramble (or a plant-based egg) with vegetables and avocado, a protein smoothie with non-dairy milk, or chia seed pudding with fruit are excellent choices.
More and more studies are showing that expert thyroid surgery done at the right center with very low complication rates is very effective at curing Hashimoto's disease and resolving many, if not all of, the symptoms associated with the illness.
TSH is a pituitary hormone that regulates thyroid hormones; typical lab ranges are ~0.4–4.0 mIU/L, but context matters. Levels >10 mIU/L are generally considered high risk and often warrant treatment; high TSH usually signals hypothyroidism.