Chronic fatigue: which hormones should be checked first?

**Chronic fatigue: which hormones should be checked first?**

Modern life is full of stress, work, household chores, numerous tasks, and information overload. That is why taking time to recover is especially important: you need to get enough sleep, rest, go for walks, and not forget about physical activity as much as possible. Feeling tired by the evening after a hard day's work or other exertion is completely natural. Usually, a little rest or a good night's sleep is enough to feel good again in the morning.

Ordinary fatigue can gradually accumulate and become chronic. This does not happen in one day: for a certain period, the body compensates for the lack of rest through the more intense functioning of internal systems, including the endocrine system. How long such a period lasts is highly individual and depends on many factors.

**If the complaint is constant fatigue, which tests should you start with?**

If a person gets enough sleep and rest but the feeling of weakness persists, they should consult a doctor. Especially if fatigue is felt from the morning or appears even after minor physical or emotional exertion.

In this case, the first step is to check the thyroid function. A deficiency of its hormones can be accompanied by a decrease in physical and mental performance. However, the cause of constant fatigue is not always related to the endocrine system. For example, one of the most common causes, especially in women, is anemia. Therefore, it is better to choose specific tests together with a doctor, taking into account other complaints and symptoms.

**What is the connection between the thyroid gland and chronic fatigue?**

Thyroid hormones are essential for supporting the vital functions of the body. They participate in metabolic processes, heart activity, maintaining normal blood pressure, and regulating heart rhythm. When there is a lack of thyroid hormones, physical and mental performance can decrease. Therefore, checking its function can be one of the first steps in searching for the causes of a constant lack of strength and energy.

At the same time, thyroid function is less susceptible to external factors such as stress and lack of rest. This means that chronic fatigue itself does not mean the problem lies precisely in the thyroid gland.

**Can fatigue be related to cortisol and chronic stress?**

Chronic stress and a constant lack of rest indeed affect a person's general well-being. If a person lives in such a mode for a long time and does not take time to recover, ordinary fatigue can gradually become chronic. For a certain period, the body compensates for the lack of rest through the strain of internal processes, including the endocrine system. The duration of this period varies for everyone.

But this does not mean that in a state of chronic stress, one should immediately take a cortisol test. The work of the adrenal glands is less susceptible to external factors, and dysfunction of their activity is observed very rarely. Checking cortisol levels in routine practice without a doctor's recommendation is often unjustified, and misinterpreting the result can only increase unnecessary stress.

An endocrinologist determines the need to check adrenal hormones during an appointment based on symptoms. For example, one of the signs of their insufficient functioning can be a tendency toward low blood pressure.

**If fatigue is accompanied by changes in cycle, sleep, and mood, should sex hormones be checked?**

If a person constantly does not get enough sleep or sleeps poorly, the circadian rhythms of sex hormone secretion can be disrupted. This can lead to a decrease in libido, changes in the menstrual cycle in women, and difficulties in getting pregnant.

If constant fatigue is accompanied by menstrual cycle irregularities in women, and a decrease in sexual function in men, this should be reported to a doctor. Especially if frequent headaches also occur at the same time. With such complaints, a doctor may order a blood test to check sex hormones.

**What tests do people take unnecessarily?**

A clear example of this is the cortisol test. Since cortisol is associated with stress, it is understandable to check it during constant fatigue. However, conducting such a test without a doctor's recommendation is often unjustified.

Adrenal gland dysfunction is very rare. An endocrinologist can determine whether their function really needs to be checked by assessing symptoms during an appointment. Taking a cortisol test independently and misinterpreting the result can only increase unnecessary stress.

**If the tests are normal but the fatigue persists — what to do next?**

If all hormones are normal, that is good news. This means other causes of fatigue need to be sought. The endocrinologist may advise consulting a general practitioner and continuing the examination with them.

There are many causes of constant fatigue. For example, anemia, which is common in women. Another cause could be depression.

In addition, the cause is not always an illness. Attention should be paid to whether enough time is allocated for sleep and rest. Moderate physical activity, walks, resting in nature, and full sleep help to recover after daily exertion.

Constant fatigue has become a common part of daily life. However, if a person gets enough sleep and rest but still lacks energy, it is best to consult a doctor and undergo the recommended examinations.