What are thyroid disorders?

The thyroid is a small but vital gland located at the front of the neck. It produces hormones that help regulate many of the body’s essential functions, including metabolism, energy levels, and temperature control.

Thyroid disorders occur when the gland produces either too much or too little hormone, or when its structure is affected by inflammation, nodules, or growths. These changes can disrupt normal metabolic processes and lead to a wide range of symptoms. Thyroid conditions are relatively common, and they can affect anyone.

Thyroid disorders are usually managed by an endocrinologist, although your GP may also be involved in your ongoing care. In some cases, other specialists - such as ophthalmologists - may be needed if complications arise.

What are the different types of thyroid disorder

There are several conditions that can affect the thyroid gland and the way it functions:

• Hyperthyroidism - when the thyroid produces too much hormone. This can sometimes lead to Graves’ disease.
• Hypothyroidism - when the thyroid does not produce enough hormone.
• Hashimoto’s thyroiditis - an autoimmune inflammation of the thyroid that can cause an enlarged thyroid (goitre).

Other thyroid conditions include:

• Thyroid nodules or adenomas - non‑cancerous growths that may sometimes cause hyperthyroidism.
• Thyroid cancer - a less common but important type of thyroid disorder.

Most thyroid disorders require ongoing monitoring or treatment by a specialist to ensure hormone levels remain balanced.

What are the symptoms of thyroid disorders?

Because thyroid hormones influence many systems in the body, symptoms can vary widely depending on the type of thyroid disorder. Common symptoms may include:

• Weight gain or weight loss
• Changes in menstrual cycles
• Difficulty concentrating
• Nervousness or anxiety
• Low mood or depression
• Fatigue
• Feeling unusually cold or hot
• Excess sweating
• Hair loss
• Mood changes
• Reduced sex drive
• Irregular heartbeat
• Protruding eyes
• Swelling in the neck (goitre)

Your doctor will assess your symptoms, medical history, and test results to determine the specific thyroid condition affecting you

What causes thyroid disorders?

Thyroid disorders can develop for many reasons. Common causes include:

• Inflammatory thyroid disease
• Certain medications
• Radiation therapy to the neck or chest
• Pregnancy‑related changes
• Iodine deficiency
• Congenital (present from birth) conditions

Anyone can develop a thyroid disorder, but some factors may increase the risk, such as:

• Being a woman over the age of 60
• Having had radiation therapy to the neck or chest
• Being pregnant or having recently given birth
• Having an autoimmune disease
• A family history of thyroid problems
• Previous thyroid surgery

Can thyroid disorders be prevented?

Thyroid disorders cannot always be prevented, but there are steps that may help reduce risk. For example, smoking is linked to thyroid eye complications in Graves’ disease, and some chemicals in cigarettes can affect thyroid function. During X‑ray procedures, a protective collar can be used to shield the thyroid from unnecessary radiation exposure.

How are thyroid disorders treated?

Treatment depends on the specific thyroid condition and the individual patient. A full medical evaluation—including blood tests to measure thyroid hormone levels—is essential to determine the most appropriate approach.

Treatment options may include:

• Medication to reduce, replace, or regulate thyroid hormone production
• Radioactive iodine therapy (in some cases)
• Surgery to remove part or all of the thyroid gland, particularly when nodules, large goitres, or cancer are present

A medical evaluation is essential in order to assess what kind of care is needed.

When is surgery recommended?

Surgery is not required for all thyroid disorders. It may be considered when:

• The thyroid is overactive and not responding to other treatments
• The gland has become very large
• Nodules, cysts, or tumours are present
• Thyroid cancer is suspected or confirmed

If the thyroid gland is removed, patients will need lifelong medication to replace the hormones normally produced by the gland.