Hypothyroidism

Hypothyroidism (Underactive Thyroid)

Hypothyroidism is a condition in which the thyroid gland does not produce enough thyroid

hormones. The thyroid is a small, butterfly-shaped gland located at the front of your neck.

Despite its small size, it plays a big role in controlling your metabolism — how your body

uses energy.

What Does the Thyroid Do?

Thyroid hormones help regulate:

• Heart rate

• Body temperature

• Energy levels

• Weight

• Growth and development

When thyroid hormone levels are low, your body’s processes slow down, leading to multiple

symptoms.

Common Causes of Hypothyroidism

• Autoimmune disease (Hashimoto’s thyroiditis): The most common

cause. The immune system attacks the thyroid, reducing hormone production.

• Iodine deficiency: Iodine is essential for making thyroid hormones.

Low iodine intake can lead to hypothyroidism.

• Surgery or radiation: Removal or treatment of the thyroid for other

conditions can reduce hormone levels.

• Certain medications: Some medicines can affect thyroid function.

• Congenital hypothyroidism: Babies born with an underactive

thyroid.

Common Symptoms

Symptoms appear gradually and can be subtle, especially in the early stages:

Symptoms appear gradually and can be subtle, especially in the early stages:

• Fatigue and tiredness

• Weight gain despite no change in diet

• Feeling cold easily

• Dry skin and hair

• Hair thinning or hair loss

• Swelling in the face

• Slow heart rate

• Constipation

• Hoarseness

• Swelling in the neck (goiter)

• Depression or low mood

• Memory problems or difficulty concentrating

In infants and children, untreated hypothyroidism can lead to growth delays and

developmental problems.

How Is Hypothyroidism Diagnosed?

Doctors diagnose hypothyroidism with a simple blood test that measures:

• TSH (Thyroid-Stimulating Hormone): High levels indicate the

thyroid is not producing enough hormone.

• Free T4: Low levels confirm low thyroid hormone.

Additional tests may check for antibodies if autoimmune disease is suspected.

How Is Hypothyroidism Treated?

The treatment is straightforward and usually lifelong.

1. Thyroid Hormone Replacement

• The most common medication is levothyroxine, a synthetic form of

thyroid hormone.

• It restores normal hormone levels and reverses symptoms.

• The dose is individualized, and regular blood tests are needed to

monitor response.

2. Lifestyle Adjustments

While medication is the main treatment, healthy habits help improve overall well-being:

• Balanced diet with adequate iodine (but not excessive)

• Balanced diet with adequate iodine (but not excessive)

• Regular exercise to boost energy and maintain weight

• Avoiding foods or supplements that interfere with thyroid medication,

such as soy, calcium, or iron, at the time of dosing

Complications if Untreated

If left untreated, hypothyroidism can lead to:

• Severe fatigue and weakness

• Heart problems, including slow heart rate or heart failure

• Swelling throughout the body (myxedema)

• Infertility

• In children, poor growth and delayed development

Early diagnosis and treatment prevent these complications.

Who Is at Risk?

• Women over 50

• People with a family history of thyroid disease

• Those with other autoimmune disorders (like type 1 diabetes)

• Pregnant women (thyroid hormone is crucial for fetal brain

development)

Preventing Hypothyroidism

• Adequate iodine intake through diet (iodized salt, seafood, dairy)

• Routine checkups, especially if you have risk factors

• Awareness of symptoms and early testing

Final Thoughts

Hypothyroidism is common and often develops slowly. Most people can live normal, healthy

lives with proper medication and regular monitoring. Recognizing symptoms early and adhering to treatment is key to preventing complications and improving quality of life.