Hypothyroidism - Common signs of hypothyroidism

Hypothyroidism, or an underactive thyroid, can cause fatigue and weight gain. Learn the key causes, common symptoms, and how it's managed with diet and treatment.

17 September, 2025

Feeling constantly tired and struggling with unexplained weight gain? Your thyroid might be the culprit. Understanding hypothyroidism is the key to getting a diagnosis, feeling better, and reclaiming your energy. Get the essential facts you need to know.

What are the main causes of Hypothyroidism?

  • The most common cause is Hashimoto's disease, an autoimmune disorder where the immune system mistakenly attacks and damages the thyroid gland over time.
  • Previous thyroid surgery, radiation therapy to the neck or chest, or certain medications can interfere with the thyroid's ability to produce enough hormones.
  • A lack of dietary iodine, an essential mineral for hormone production, is a leading cause of an underactive thyroid in some parts of the world.
Patient reviewing hypothyroidism symptoms with doctor

Key symptoms of Hypothyroidism to watch for

  • Persistent fatigue, sluggishness, and unexplained weight gain are hallmark hypothyroidism symptoms, as the body's metabolism slows down significantly.
  • Increased sensitivity to cold, dry skin, thinning hair, and brittle nails are common physical signs that your thyroid levels might be too low.
  • You might experience depression, memory problems (brain fog), and muscle weakness, which can all be attributed to insufficient thyroid hormone affecting the body.

How can you prevent Hypothyroidism effectively?

  • While autoimmune causes like Hashimoto's disease cannot be prevented, you can manage the condition effectively through medical treatment and lifestyle adjustments.
  • The standard treatment is daily hormone replacement therapy with levothyroxine, which restores adequate hormone levels and reverses the symptoms of hypothyroidism.
  • A balanced hypothyroidism diet rich in iodine, selenium, and zinc can support thyroid function, though it is not a substitute for prescribed medication.

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Image Illustrating Hypothyroidism Symptoms

Person checking weight gain on a scale
Technician preparing thyroid function test equipment
Research article discussing causes of hypothyroidism
Infographic on Hashimoto's disease symptoms
Healthy meal plan for hypothyroidism diet
Lab report showing thyroid levels analysis
Prescription bottle of levothyroxine on a pharmacy counter
Medical diagram explaining underactive thyroid condition

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If you suspect an underactive thyroid, don't wait. A simple thyroid function test can provide a clear diagnosis. Consulting with a doctor is the first step towards getting the right treatment and managing your health effectively.

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