Chronic Fatigue Syndrome: What Causes Constant Sleepiness?

Constant sleepiness and persistent fatigue are often rooted in medical conditions like chronic fatigue syndrome, thyroid problems, or vitamin deficiencies, rather than just a busy lifestyle. Especially as autumn progresses in Türkiye, changing weather conditions—like the sudden shift from warm coastal breezes to chilly city rains—and increasing work or school stress can disrupt the body's energy balance and trigger this condition. If you are experiencing exhaustion that lasts longer than six months and does not improve with rest, a medical evaluation is essential to uncover the underlying cause.

• Chronic fatigue syndrome is a condition of severe exhaustion lasting at least six months that does not improve with rest.
• Common causes of constant sleepiness include anemia, thyroid disorders, and sleep apnea.
• A sudden worsening of symptoms after physical or mental exertion is a frequent occurrence.
• Diagnosis usually requires detailed blood tests and the exclusion of other possible diseases.
• Treatment involves medications to alleviate symptoms, cognitive behavioral therapy, and graded exercise programs.

What is Chronic Fatigue Syndrome?

Medically known as myalgic encephalomyelitis, chronic fatigue syndrome is an unexplained state of severe exhaustion lasting at least six months, severe enough to prevent a person from performing their daily activities. This illness is different from ordinary tiredness because it does not go away with sleep or rest. When you exert physical or mental effort, the symptoms become much heavier. It is generally more common in adults between the ages of 30 and 50 and affects women more than men.

Although the exact mechanism of the disease has not yet been fully elucidated, it is thought to arise from a combination of immune system abnormalities, nervous system issues, and disruptions in cellular energy production. Especially in the autumn months, decreasing daylight and sudden weather changes can affect the body's biological clock, making such low-energy states more pronounced. The prevalence in society ranges from one to two percent, but most patients delay getting a diagnosis because they attribute their condition to stress.

Causes and Risk Factors of Constant Sleepiness and Fatigue

Persistent fatigue and constant sleepiness do not develop due to a single cause; there is usually a complex interaction of genetic, environmental, and psychological factors. Viral infections stand out among the most common causes of fatigue. An overreaction of the immune system following severe infections like the Epstein-Barr virus or influenza can lead to long-term exhaustion. In addition, hormonal imbalances play a major role. An underactive thyroid gland or problems in the adrenal glands, in particular, directly slow down the body's energy metabolism.

When examining risk factors, those working under intense and constant stress, individuals with perfectionist personalities, and those with irregular sleep habits rank first. With the fast-paced life in modern Turkish cities, these stressors are increasingly common. Common vitamin and mineral deficiencies in women, especially iron, B12, and vitamin D deficiencies, prevent sufficient oxygen from being carried to the cells, creating low energy. Furthermore, obesity, a sedentary lifestyle, and a history of chronic depression are significant factors that increase the likelihood of developing this syndrome.

Symptoms of the Disease and the Low Energy Picture

Although the symptoms of chronic fatigue syndrome vary from person to person, the main complaint is always unexplained low energy that brings daily life to a standstill. In the early stages of the disease or when it is mild, difficulty waking up in the morning, a constant need to yawn during the day, and difficulty focusing are observed. However, as the condition becomes more serious, symptoms are not limited to fatigue; physical pain and cognitive problems are added to the picture.

The most common symptoms are:

• Extreme exhaustion lasting more than 24 hours after physical or mental exertion.
• Unrefreshing sleep; waking up tired in the morning no matter how much you sleep at night.
• Short-term memory loss, difficulty finding words, and lack of concentration.
• Unexplained muscle and joint pain, wandering pains without redness or swelling.
• Frequent sore throats and tenderness in the lymph nodes of the neck or armpits.

In older age groups, these symptoms are often perceived as a natural consequence of aging and may be overlooked. In young adults, a sudden and significant drop in school or work performance is the first noticeable sign.

Diagnosis: How is it Diagnosed in the Hospital?

There is no single blood test or imaging method that definitively confirms chronic fatigue syndrome. Therefore, the diagnostic process is based on the principle of ruling out other medical conditions that can cause similar symptoms one by one. When you visit the hospital, your doctor will first listen to your medical history in detail and perform a comprehensive physical examination. When your complaints started, your sleep patterns, and the severity of your pain are of great importance at this stage.

A series of laboratory tests are requested to rule out other underlying diseases. A complete blood count checks for the presence of anemia or infection. Thyroid function tests are essential to evaluate your metabolic rate. Blood sugar, liver, and kidney function tests, as well as iron-binding capacity, ferritin, vitamin B12, and vitamin D levels, are measured. If sleep apnea is suspected, a sleep test may be performed by having you spend a night in the hospital's sleep laboratory. If the results of all these tests are normal and the fatigue has been ongoing for six months, the syndrome is diagnosed based on clinical criteria.

Treatment: Home Care and Hospital Methods

The main goal of treatment is to improve the patient's quality of life by alleviating symptoms, rather than completely eliminating the disease. Medical treatments applied in the hospital are planned for the most bothersome complaints. If sleep disturbance is prominent, prescription medications are arranged to improve sleep quality. Painkillers or muscle relaxants are recommended for muscle and joint pain. Additionally, intravenous vitamin and mineral supplements may be administered under a doctor's supervision to support energy metabolism.

Home care and lifestyle changes are an integral part of treatment. Graded exercise therapy aims to slowly increase physical capacity, starting with light stretching or short walks, without pushing the patient's limits. Cognitive behavioral therapy, on the other hand, improves the patient's coping skills with the disease and lightens the psychological burden created by fatigue. The recovery process is usually long-term; the majority of patients recover over months or years with a fluctuating course. Managing energy correctly when planning daily activities and learning to rest before becoming overly tired is a critical step for the success of the treatment.

Complications and Risk Groups

Untreated or neglected chronic fatigue syndrome leads to complications that severely restrict a person's life over time. The most common complication is social isolation and subsequent major depression. The patient withdraws from gatherings with friends, family activities, and hobbies due to a lack of energy. Frequent absenteeism and poor performance in professional life can create financial and emotional problems leading up to job loss. Furthermore, the risk of muscle wasting, weight gain, and cardiovascular diseases increases due to prolonged inactivity.

In terms of risk groups, occupational groups working under high stress, such as healthcare workers, teachers, and professionals working long hours in corporate life, are more vulnerable. Those with a genetic predisposition, meaning individuals with a family history of similar autoimmune or fatigue-related diseases, are also at risk. The likelihood of developing this syndrome is quite high in people who have previously had a severe viral infection and have not fully recovered. It is vital for individuals in these risk groups to pay attention to the resting signals their bodies give.

When to See a Doctor?

Not every feeling of fatigue is a sign of an illness; however, if your complaints last for weeks despite paying attention to your rest and sleep patterns, you should see a specialist without delay. Especially if fatigue is accompanied by unexplained weight loss, night sweats, or palpable hard lumps anywhere on the body, this could be a harbinger of a more serious disease.

If you experience any of the following emergency warning signs, you should immediately call 112 or go to the nearest emergency room:

• A feeling of pressure or tightness in the chest, or severe pain radiating to the left arm.
• Shortness of breath, a feeling of choking, or gasping for air even while resting.
• Sudden onset of a severe headache, confusion, or impaired speech.
• Sudden loss of strength, numbness, or paralysis-like symptoms on one side of the body.
• Fainting or dizziness severe enough to prevent standing.

Regardless of fatigue, these symptoms can be signs of conditions requiring immediate intervention, such as a heart attack, stroke, or acute respiratory failure.

The Process at BHT CLINIC

For your complaints of persistent fatigue and sleepiness, you can consult the Internal Medicine Department at BHT CLINIC İstanbul Tema Hastanesi. Our expert medical staff will conduct a detailed evaluation using the latest laboratory and imaging technologies to find the underlying cause of your symptoms. When coming to our hospital, bringing your previous blood test results, a list of medications you use regularly, and any other medical records will speed up the diagnostic process.

For severe symptoms or emergencies that develop unexpectedly, our hospital's emergency department provides uninterrupted service 24/7. Our Internal Medicine specialists will create the most appropriate treatment plan for you, adopting a multidisciplinary approach with the neurology, psychiatry, or physical therapy departments when necessary.

Frequently Asked Questions

Is chronic fatigue syndrome completely curable?

Although there is no definitive cure for the disease, symptoms can be largely controlled with the right medical approach and lifestyle changes. Many patients improve enough over time to return to their daily activities.

Which vitamin deficiency causes constant sleepiness?

Constant sleepiness and exhaustion most commonly develop due to deficiencies in vitamin B12, vitamin D, and iron. These vitamins and minerals should be measured with blood tests and supplemented under a doctor's supervision if there is a deficiency.

Which department and doctor should I see for fatigue?

For complaints of fatigue that do not go away with rest, you should first apply to the Internal Medicine department. The internal medicine specialist will investigate the underlying cause by performing the necessary initial tests and refer you to other branches if necessary.

Does stress cause chronic fatigue?

Yes, prolonged and unmanaged intense stress suppresses the adrenal glands and the immune system, paving the way for chronic fatigue. Psychological burdens rapidly deplete the body's energy reserves, leading to physical exhaustion.

Is drinking coffee good for chronic fatigue?

Although caffeine provides alertness in the short term, excessive coffee consumption can disrupt sleep quality and further increase fatigue in the long run. Therefore, it is recommended that patients experiencing chronic fatigue limit their caffeine intake.

To return to healthy and energetic days, you can book an appointment to consult with our specialist doctors.

This article is for informational purposes only; please be sure to consult your doctor for diagnosis and treatment.