Thyroid and fatigue, weight gain and hair loss – when to get tested?

Fatigue despite a good night's sleep, weight problems despite a healthy diet, and hair loss? These could be signs that your thyroid isn't functioning properly . This inconspicuous gland has a huge impact on your metabolism, hormonal balance, well-being, and appearance. Find out when it's worth getting your thyroid checked and what to pay special attention to.

Thyroid – small gland, big impact

The thyroid is a gland located at the base of the neck that produces the hormones thyroxine (T4) and triiodothyronine (T3) . Their function influences virtually all body processes – from metabolism and heart function to the menstrual cycle and skin condition.

Symptoms that may indicate thyroid problems

Some ailments, though seemingly harmless or attributed to everyday stress, may result from thyroid disorders , such as hypothyroidism or hyperthyroidism . Pay particular attention to:

Chronic fatigue and drowsiness

If you feel exhausted despite rest, have trouble concentrating, or struggle with brain fog, these may be the first signs of hypothyroidism .

Gaining weight without changing your diet

Slow metabolism caused by thyroid hormone deficiency can cause sudden weight gain, water retention and difficulty losing weight.

Hair loss and weakening

Is your hair becoming thin, brittle, or falling out in clumps? The thyroid gland has a direct impact on the hair growth cycle – hormonal imbalances often lead to telogen effluvium .

Other symptoms that may accompany:

• dry skin,
• constipation,
• irregular periods,
• low mood or depression,
• feeling cold.

When should you do thyroid tests?

It is worth considering thyroid diagnostics if:

You have the above symptoms, especially if they occur together and last longer than a few weeks .

There is a family history of thyroid disease (Hashimoto, Graves-Basedow).

You are a woman – thyroid diseases are up to 10 times more common in women than in men, especially after the age of 30.

Are you planning a pregnancy or are already pregnant – thyroid hormones influence the development of the fetal nervous system.

You have other autoimmune diseases (e.g. type 1 diabetes, celiac disease, rheumatoid arthritis).

What tests are worth doing?

🔬 TSH – the basic pituitary hormone regulating the thyroid function
🔬 FT4 and FT3 – free fractions of thyroid hormones
🔬 Anti-TPO and anti-TG – antibodies against the thyroid (Hashimoto, Graves-Basedow)
🔬 Thyroid ultrasound – assessment of the size and structure of the gland

Could something be missed?

Yes, the symptoms of hypothyroidism develop slowly , which is why they're often confused with fatigue, menopause, or stress. That's why preventative thyroid tests done annually, especially if you're in a risk group.

If you're struggling with chronic fatigue, weight gain, or hair loss , don't ignore these symptoms. They may be due to hypothyroidism or hyperthyroidism , and prompt diagnosis is key to effective treatment and improved quality of life. A simple blood test is all it takes to regain control of your health.

❓ FAQ – Frequently asked questions about thyroid tests

1. Does fatigue always indicate a thyroid problem?
   No, but if fatigue is accompanied by, for example, weight gain, drowsiness, hair loss, or feeling cold, it's worth having your thyroid checked. These symptoms may indicate hypothyroidism.
2. How often should thyroid tests be performed?
   For asymptomatic individuals, once a year as a preventative measure, especially for women over 30. For individuals with symptoms or autoimmune diseases, as recommended by a physician.
3. Do thyroid tests need to be done on an empty stomach?
   No – blood tests (TSH, FT3, FT4, antibodies) don't need to be done on an empty stomach, but it's best to do them at the same time each day. This allows for reliable results.
4. Can hair loss be the only symptom of thyroid problems?
   Yes. For some people, hair loss may be one of the first or predominant symptoms of thyroid hormone imbalance, especially in women.
5. Can stress disrupt thyroid function?
   Yes. Chronic stress affects the hormonal system and can exacerbate existing thyroid disorders, although it is rarely a direct cause of the condition.
6. Which hormones should be tested if thyroid problems are suspected?
   The basic test kit includes: TSH , FT3 , FT4 , anti-TPO, and anti-TG . A thyroid ultrasound .
7. Are thyroid diseases hereditary?
   Yes, autoimmune thyroiditis (Hashimoto's, Graves'), in particular, often runs in families. If someone in your family has the disease, it's worth getting tested early.
8. Does thyroid treatment mean lifelong medication?
   Not always. In cases of hypothyroidism, this is most often the case (levothyroxine treatment), but the dosages may vary. For hyperthyroidism, various treatment options are available, including pharmacological treatment, iodine therapy, or surgery.