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10 Early Warning Signs of Thyroid Problems to Watch Out For

Apr 21, 2024 | 6 min read

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The signs of thyroid issues can be subtle and varied, including unexpected weight changes, fluctuations in energy and mood, and alterations in heart rate. With an estimated 20 million Americans affected by some form of thyroid disease, according to the American Thyroid Association data, understanding these signs is more important than ever. 

what are early warning signs of thyroid problems

Understanding the Thyroid Gland

The thyroid gland, though small, is mighty, having a profound impact on our health. It is a crucial part of the endocrine system, located at the base of your neck, resembling a butterfly in shape. Here’s how it works and what can go wrong:

Function of the Thyroid

  • Produces vital hormones such as thyroxine (T4) and triiodothyronine (T3).
  • These hormones regulate metabolic processes like energy usage, heat production, and oxygen consumption.
  • A balanced production keeps your body's systems running smoothly.

Common Thyroid Disorders

  • Hypothyroidism: The thyroid doesn’t produce enough hormones, slowing down bodily functions.
  • Hyperthyroidism: An overactive thyroid speeds up body processes.
  • Other conditions include thyroid nodules and goiter, which involve abnormal growths.
thyroid gland

Early Warning Signs of Thyroid Problems

Understanding the early warning signs of thyroid problems can make a significant difference in managing these conditions effectively. Let’s delve into these signs more comprehensively:

1. Unexpected Weight Changes

One of the hallmark signs of a thyroid disorder is an unexplained change in weight. 

  • Hyperthyroidism can cause unexpected weight loss, even if your eating and exercise habits haven’t changed. This happens because an overactive thyroid ramps up your metabolism, causing your body to burn calories at a faster rate. 
  • Hypothyroidism might lead to weight gain. Even if you’re consuming the same amount of food and maintaining your exercise routine, a slowed metabolism means your body isn’t burning calories as efficiently, leading to weight gain.

2. Changes in Energy Levels or Mood

Thyroid disorders can also have a significant impact on your energy levels and mood. 

  • Hypothyroidism often leads to fatigue. You might feel like you’re running on empty, despite getting a full night’s sleep. This is because your body’s energy production is lagging due to the slowed metabolism. 
  • Hypothyroidism can contribute to feelings of depression
  • Hyperthyroidism can leave you feeling anxious, jittery, or irritable. It can also make it hard to sleep, as your body feels like it’s in overdrive due to the excess thyroid hormones. According to the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), hyperthyroidism in older individuals might not present with the typical symptoms one might expect. Instead, it's sometimes mistaken for depression or dementia.

3. Alterations in Heart Rate

The thyroid plays a key role in regulating your heart rate. 

  • With hypothyroidism, you might notice your heart beating more slowly than usual, a condition known as bradycardia. This can make you feel tired or dizzy. 
  • Hyperthyroidism, however, can lead to a faster-than-normal heart rate, known as tachycardia, along with palpitations and increased blood pressure.

These changes in heart rate are not only uncomfortable but can also be concerning if they’re sudden or severe.

4. Changes in Hair and Skin

Your hair and skin can offer clues about your thyroid health. 

  • Hypothyroidism can lead to noticeable hair loss, not just on your scalp but throughout your body. Your skin might become dry, itchy, and pale. It may also feel puffy or swollen, especially around the eyes. 
  • Hyperthyroidism can cause your hair to thin and become brittle. Your skin might turn oily or excessively sweaty. These changes occur because thyroid hormones directly affect the skin and hair follicles, influencing their growth, texture, and health.

5. Temperature Sensitivity

A change in your sensitivity to temperature could signal thyroid issues. 

  • Those with hypothyroidism often report feeling colder than usual, even in warm environments. This happens because a lack of thyroid hormones can reduce your body's metabolism, which also lowers your body's heat production. 
  • Conversely, hyperthyroidism can make you feel unusually warm or sweat more, as an overactive thyroid increases your metabolism, leading to increased heat production. Paying attention to these shifts in temperature sensitivity, especially when out of character for you, can be crucial.

6. Bowel Movement Changes

The thyroid gland also influences your digestive system. 

  • Hypothyroidism can lead to constipation due to a slower metabolic rate, which slows down digestive processes. 
  • Hyperthyroidism might cause more frequent bowel movements or even diarrhea, as bodily processes, including digestion, are sped up. These changes in bowel habits, particularly when there are no other obvious causes, might indicate a thyroid disorder.

7. Throat or Neck Discomfort

Discomfort in the throat or neck, including swelling, tightness, or noticeable changes in your voice, can directly indicate thyroid issues. This discomfort can stem from an enlarged thyroid gland (goiter) or nodules that have developed on the thyroid. Any noticeable swelling, discomfort, or changes in the neck area should be evaluated, as these could be signs of thyroid disease or growth that need attention.

8. Muscle Weakness or Tremors

Unexplained muscle weakness or tremors, especially in the arms and legs, can be a sign of thyroid dysfunction. 

  • Hyperthyroidism can lead to tremors in the hands and fingers, a symptom of excessive thyroid hormone production affecting the nervous system. 
  • Hypothyroidism might manifest as general muscle weakness or fatigue, making routine tasks feel more strenuous. 


These symptoms are due to the impact of thyroid hormones on muscle function and energy utilization.

9. Changes in Menstrual Patterns

Women with thyroid disorders may notice changes in their menstrual cycles. 

  • Hypothyroidism can cause periods to be heavier, longer, or more frequent.
  • Hyperthyroidism may lead to lighter, shorter periods or even cause menstruation to stop altogether (amenorrhea). 

Because thyroid hormones play a role in regulating the menstrual cycle, any irregularities should be discussed with a healthcare provider.

10. Difficulty Sleeping or Concentrating

Thyroid disorders can affect your sleep and cognitive functions. 

  • Hyperthyroidism can make it difficult to fall asleep or stay asleep, leading to insomnia, which in turn can affect concentration and memory.
  • Hypothyroidism, while often causing fatigue, can also interfere with sleep quality, and the resultant sluggishness during the day can impair cognitive functions, making it hard to focus or concentrate. 

These changes in sleep patterns and mental clarity can significantly impact daily life, making awareness and management of thyroid health all the more important.

Risk Factors and Prevention

Thyroid problems can affect anyone, but certain factors increase the risk. Understanding these can help in early detection and management:

  • Age: The risk of thyroid disorders increases with age. Older adults are more likely to experience thyroid issues, although they can occur at any age.
  • Gender: As highlighted by the American Thyroid Association, women are five to eight times more likely than men to experience thyroid issues.
  • Family History: Genetics plays a crucial role. If thyroid problems run in your family, your risk of experiencing similar issues is higher.


While some risk factors like age, gender, and genetics are beyond control, lifestyle choices can play a significant role in maintaining thyroid health:

  • Iodine Intake: Iodine is essential for thyroid hormone production. Ensure your diet includes enough iodine, found in foods like fish, dairy, and iodized salt. However, too much iodine can also harm thyroid function, so balance is key.
  • Avoid Exposure to Radiation: High levels of radiation from medical treatments or environmental exposure can increase the risk of thyroid problems.
  • Regular Exercise: Maintaining a healthy weight and regular exercise can help in overall endocrine health, including the thyroid.
  • Monitoring Soy Intake: While soy doesn't directly cause thyroid issues, it can interfere with the body's ability to use thyroid hormone, especially in individuals with iodine deficiency.

When to See a Doctor

Recognizing when symptoms suggest a need for professional evaluation is crucial. If you notice any persistent changes in weight, energy levels, mood, or other signs mentioned earlier, it's time to see a doctor. This is particularly important if you:

  • Experience symptoms that significantly impact your daily life.
  • Have a family history of thyroid disease.
  • Are a woman over the age of 60.

Regular check-ups are essential for those at risk. Early detection and treatment of thyroid issues can prevent complications and significantly improve quality of life. If you're beginning to notice symptoms but are unsure about their significance, an online tool like Symptom Checker can help you. This tool can provide insights into whether your symptoms might be related to thyroid issues or other conditions. However, it's crucial to remember that online tools are not intended to substitute professional medical advice, diagnosis, or treatment.

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Key Takeaways

  • Thyroid disorders can manifest through various signs, such as unexpected weight changes, alterations in energy levels and mood, and changes in heart rate.
  • Sensitivity to temperature, changes in bowel movements, and discomfort in the throat or neck area are significant indicators to watch out for.
  • Muscle weakness, tremors, changes in menstrual patterns, and difficulties in sleeping or concentrating can also signal thyroid issues.
  • Risk factors for thyroid problems include age, gender, and family history, but lifestyle choices can impact thyroid health.
  • Regular check-ups and being proactive about symptoms are essential, especially for those at higher risk.
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