Hyperthyroidism Treatment in Singapore

Hyperthyroidism develops when the thyroid gland produces an excess of hormones, primarily thyroxine (T4) and triiodothyronine (T3). These hormones are necessary for regulating metabolism, heart rate, body temperature, and other body functions. When their levels are too high, the body’s processes accelerate, leading to a variety of symptoms that can affect physical health and overall quality of life.

Dr Donovan Tay

Senior Consultant Endocrinologist

Dr Ben Ng

Senior Consultant Endocrinologist

Symptoms of Hyperthyroidism

The effects of excess thyroid hormones can manifest throughout multiple body systems, presenting various signs that may develop gradually or suddenly.

Rapid Heart Rate and Palpitations

The increased metabolic rate causes the heart to beat faster than normal, often exceeding 100 beats per minute at rest. Patients may also experience irregular heartbeats or fluttering sensations in their chest.
Unexplained Weight Loss

Despite maintaining or increasing food intake, patients often lose weight as the excess thyroid hormones speed up metabolism and increase calorie burning.
Increased Heat Sensitivity and Sweating

The accelerated metabolism raises body temperature, leading to increased sweating and difficulty tolerating warm environments.
Tremors

Fine trembling in hands and fingers occurs due to the heightened nerve and muscle response to thyroid hormones.
Anxiety and Irritability

The overstimulation of the nervous system can cause restlessness, difficulty concentrating, and mood changes.
Sleep Disturbances

Many patients experience difficulty falling or staying asleep due to the stimulating effects of excess thyroid hormones.
Eye Changes

Some patients develop protruding or bulging eyes, particularly in cases related to Graves’ disease.
Skin and Hair Changes

The skin may become warm and moist, while the hair may become fine and brittle.

Causes and Risk Factors

Several factors can lead to the overproduction of thyroid hormones, with some individuals having a higher predisposition to developing this condition.

Autoimmune Disorders

Graves’ disease, where antibodies stimulate the thyroid to produce excess hormones, accounts for approximately 80% of hyperthyroidism cases.
Thyroid Nodules

One or more lumps can develop in the thyroid gland, which may become overactive and produce excess hormones without responding to the body’s usual regulatory signals.
Excessive Iodine Intake

Consuming large amounts of iodine through diet or medications can trigger overproduction of thyroid hormones in susceptible individuals.This condition is rare in Singapore due to its close proximity to the sea.
Thyroiditis

Inflammation of the thyroid gland can cause stored hormones to leak into the bloodstream, resulting in temporary hyperthyroidism.
Gender and Age

Women are 5-10 times more likely to develop hyperthyroidism, with the condition most commonly occurring between ages 20-40.
Family History

Individuals with relatives who have thyroid disorders face an increased likelihood of developing hyperthyroidism.

Types of Hyperthyroidism

The classification of hyperthyroidism depends on the underlying cause, with each type presenting distinct characteristics that influence treatment approaches.

Graves’ Disease

This is an autoimmune condition where antibodies stimulate the thyroid to produce excessive hormones. This type often runs in families and frequently affects multiple body systems, including the eyes and skin. The thyroid gland typically enlarges uniformly, and specific antibodies can be detected in blood tests.

Toxic Nodular Goiter

This type develops when small, round growths called nodules form in the thyroid tissue. These nodules function independently from normal thyroid regulation, producing excess hormones regardless of the body’s needs. The condition typically progresses slowly and occurs more frequently in older adults.

Subacute Thyroiditis

This is a temporary form of hyperthyroidism that occurs when the thyroid gland becomes inflamed, often following a viral infection. The inflammation causes stored thyroid hormones to leak into the bloodstream. This type usually resolves within a few months, though it may be followed by a period of hypothyroidism before returning to normal function.

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Diagnostic Methods

Blood Tests

Blood tests are the primary method for diagnosing hyperthyroidism. They measure T3 (triiodothyronine) and T4 (thyroxine) levels, which are usually elevated, while TSH (thyroid-stimulating hormone) is typically very low. These tests also help detect thyroid antibodies, which can confirm autoimmune causes like Graves’ disease.

Radioactive Iodine Uptake Test

This imaging test identifies the cause of an overactive thyroid. Patients take a small dose of radioactive iodine, and specialised cameras measure how much iodine the thyroid absorbs. The absorption pattern helps distinguish conditions like Graves’ disease from thyroiditis or toxic nodular goitres.

Ultrasound

This non-invasive test uses sound waves to produce detailed images of the thyroid. It detects nodules, measures their size, and determines whether they are solid or fluid-filled, providing valuable information for diagnosis and treatment planning.

Treatment Options

The treatment approach for hyperthyroidism varies based on several factors, including the underlying cause, severity of symptoms, patient age, and overall health status.

Non-Surgical Treatment

Anti-thyroid Medications

These medications, such as methimazole or propylthiouracil, work by blocking the thyroid’s ability to produce hormones. Treatment typically continues for 12-18 months, with regular monitoring of thyroid function to adjust dosage as needed.

Beta Blockers

While these medications do not treat the underlying condition, they help control symptoms like rapid heart rate, tremors, and anxiety. They provide relief while other treatments begin to take effect.

Radioactive Iodine Therapy

This treatment involves taking radioactive iodine orally, which concentrates in thyroid tissue and gradually destroys overactive cells. The effects develop over weeks to months, and patients require regular monitoring as the treatment often leads to hypothyroidism.

Surgical Treatment

Thyroidectomy

A thyroidectomy involves removing part or all of the thyroid gland and is recommended in cases where other treatments are ineffective, large goitres cause significant breathing or swallowing issues, or thyroid cancer is suspected. Following surgery, patients will require lifelong thyroid hormone replacement therapy to support normal metabolic function.

Prevention and Management

Effective management of hyperthyroidism requires regular monitoring of thyroid function through blood tests and timely adjustments to treatment plans. Maintaining a consistent medication schedule and attending follow-up appointments with healthcare providers are necessary for optimal control.

A balanced diet supports overall well-being, though certain dietary restrictions may be needed depending on the treatment approach. Moderate physical activity tailored to symptom severity can improve general health, while stress management techniques may help reduce the risk of symptom flare-ups.

Frequently Asked Questions

Can pregnancy affect thyroid function?

Pregnancy can influence thyroid hormone levels and may unmask previously undiagnosed thyroid conditions. Regular thyroid monitoring during pregnancy helps prevent complications for both mother and baby.

Does hyperthyroidism always require lifelong treatment?

Some cases, particularly those caused by temporary conditions like thyroiditis, may resolve without long-term treatment. However, conditions like relapsing Graves’ disease typically require ongoing management.

What happens if hyperthyroidism remains untreated?

Untreated hyperthyroidism can lead to heart problems, bone density loss, and a severe condition called thyroid storm, which requires immediate medical attention. Regular monitoring and adherence to prescribed treatments help prevent these complications.

Dr Ben Ng

Senior Consultant Endocrinologist

As a senior consultant endocrinologist with over 20 years of clinical experience, Dr Ben Ng provides comprehensive care for patients managing various endocrine conditions. His expertise includes the diagnosis and treatment of diabetes, thyroid disorders, obesity, and a range of other metabolic and endocrine conditions.

Dr Ben Ng Jen Min graduated from the Queens University of Belfast Northern Ireland, United Kingdom (UK).
He completed his postgraduate training with the certificate of completion of training (CCT) from the Royal College of Physicians (UK) with dual accreditation in diabetes and endocrinology and in general internal medicine.
In 2010, he was awarded an MD with honours by the University of Hull, UK, in recognition for his research in diabetes mellitus

Dr Donovan Tay

Senior Consultant Endocrinologist

As a senior consultant endocrinologist with over 20 years of clinical experience, Dr. Donovan Tay provides comprehensive care for patients managing various endocrine conditions. His expertise includes the diagnosis and treatment of diabetes, thyroid disorders, osteoporosis, and a range of other metabolic and endocrine conditions.

Dr. Donovan Tay graduated from the National University of Singapore (NUS) and obtained his membership in the Royal College of Physicians (UK), Master of Medicine (NUS), and Master of Clinical Investigation (NUS).
After completing training in endocrinology, he was conferred as a Fellow of the Academy of Medicine, Singapore (FAMS).
He further specialised in endocrinology with a fellowship at the prestigious Columbia University Medical Centre in New York City.

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