Thyroid disorders: Understanding Graves' disease and hypothyroidism
The thyroid is a small gland in the neck that regulates metabolism and other vital functions through hormone production. When the thyroid is overactive or underactive, it can lead to conditions like Graves' disease and hypothyroidism.
In this article, consultant endocrinologist Dr Bobby Huda explores these disorders, their symptoms, causes, and treatment options to help you understand how they affect the body.
What are thyroid disorders?
Thyroid disorders occur when the thyroid gland does not function properly. The thyroid produces hormones that help regulate metabolism, energy production, and other vital processes in the body.
When the thyroid produces an excess or insufficient amount of hormones, it can lead to health problems.
There are two main types of thyroid disorders:
- Hyperthyroidism: the thyroid becomes overactive and produces excess thyroid hormones.
- Hypothyroidism: the thyroid becomes underactive and does not produce enough hormones.
What is Graves' disease?
Graves' disease is an autoimmune disorder where the immune system mistakenly attacks the thyroid, causing it to produce excess thyroid hormones, which in turn speeds up many of the body's processes.
This leads to hyperthyroidism, which can have significant effects on the body.
Symptoms of Graves' disease
The following symptoms occur because the excess thyroid hormones cause the body to work faster than normal:
- Unexplained weight loss
- Rapid or irregular heartbeat
- Anxiety or nervousness
- Increased sweating
- Tremors (shaking hands)
- Bulging eyes (also known as exophthalmos)
- Heat intolerance
Causes and risk factors
While the exact cause of Graves' disease is unknown, several factors can increase the risk, including:
- Family history of thyroid disorders
- Gender (more common in women)
- Emotional stress or trauma
- Age (most common between 20 and 40)
- Smoking (increases risk, especially for eye symptoms)
Treatment of Graves' disease
Treatment options aim to reduce the production of thyroid hormones and manage symptoms. These include:
- Antithyroid medications: medications like carbimazole help reduce the production of thyroid hormones.
- Radioactive iodine therapy: This treatment destroys overactive thyroid tissue to reduce hormone production.
- Surgery: if other treatments are not effective or if the disease is severe, part or all of the thyroid may need to be removed.
A combination of treatments may be used depending on the severity of the disease.
What is hypothyroidism?
Hypothyroidism occurs when the thyroid gland becomes underactive and doesn’t produce enough thyroid hormones.
This results in the body’s processes slowing down, causing a variety of symptoms.
Symptoms of hypothyroidism
Common symptoms of hypothyroidism include:
- Fatigue or feeling sluggish
- Unexplained weight gain
- Dry skin and hair
- Sensitivity to cold
- Depression or low mood
- Constipation
- Muscle weakness
Causes and risk factors
Hypothyroidism can be caused by several factors, including:
- Autoimmune disease (Hashimoto’s thyroiditis): this is the most common cause, where the immune system attacks the thyroid gland.
- Thyroid surgery: removal of part or all of the thyroid gland can lead to hypothyroidism.
- Radiation treatment: radiation used in the treatment of certain cancers can damage the thyroid gland, leading to hypothyroidism.
- Iodine deficiency: though rare in the UK, iodine deficiency can lead to hypothyroidism.
- Age: hypothyroidism is more common in women over 60 years old.
Treatment of hypothyroidism
Hypothyroidism is generally treated with thyroid hormone replacement therapy, which involves taking synthetic thyroid hormones like levothyroxine to bring hormone levels back to normal.
This treatment is lifelong and requires regular monitoring, but it’s usually very effective in managing the condition.
Thyroid disorders, can significantly affect your quality of life if left untreated. Whether the thyroid is overactive, as in Graves' disease, or underactive, as in hypothyroidism, medical treatments are available that can help restore balance and improve well-being.
If you experience symptoms of thyroid dysfunction, consult with Dr Huda via his Top Doctors profile for a proper diagnosis and personalised treatment plan.