Do you feel tired all the time?

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If you still do not know why you are tired most of the time, the information below might be useful to know the cause. Most people tend to consider fatigue a result of lifestyle pace and they are often right.

We must not ignore constant fatigue. Make some changes in your lifestyle, sleep longer, eat more healthy foods, drink more fluids, take multivitamins and reduce consumption of caffeine and alcohol.

If symptoms of fatigue persist even after these changes, you need the help of a doctor. Depletion could be a sign of very serious diseases that could be treated if detected early. Here could be the most common reasons for fatigue.


1. Overview
2. Anemia
3. Diabetes
4. Thyroid disorders
5. Depression
6. Rheumatoid arthritis
7. Sleep apnea
8. Chronic fatigue


This condition is often found in women with heavy or prolonged menstrual periods, or who not eating enough iron. Fatigue caused by anemia is the result of lack of red blood cells, cells that bring oxygen from lungs to tissues and cells.

You may feel weak and breathing may be shortened. Anemia can be caused by iron or vitamin deficiency, blood loss, internal bleeding or chronic diseases such as rheumatoid arthritis, cancer or kidney failure.

Women of childbearing age are very susceptible to anemia resulting from iron deficiency due to blood loss during menstruation, so the body needs more iron during pregnancy and lactation.
Events: Fatigue is a major symptom. Are there extreme weakness, sleep disorders, lack of concentration, rapid heartbeat, chest pain and headaches. Simple efforts such as walking short distances can cause fatigue.

Investigation: thorough evaluation for anemia includes a complete physical examination and blood tests, including a complete blood count to check the level of red blood cells.


Diabetes mellitus includes a series of related diseases in which the body can’t regulate the amount of sugar (glucose) in blood. Glucose provides energy to the body to perform all the activities that a person carries out daily.

The liver converts food that a person consumes into glucose. Glucose is then released into the bloodstream. In a healthy person, blood glucose level is balanced by several hormones, primarily insulin.

Insulin is produced by the pancreas, a tiny organ located between the stomach and liver. The pancreas produces important enzymes that are released directly into the intestine and help digest food.

Insulin allows glucose from the blood moving in all body cells for it to be used for energy production. In people with diabetes the pancreas do not produce enough insulin (type 1 diabetes) or insulin can’t be used properly (type 2 diabetes), or both situations (which are found in several forms of diabetes) .

In the case of diabetes, blood glucose can’t move efficiently through the cell and its values remain high. Phenomenon not only deprives the cells that need glucose for energy, but it also affects some organs and tissues exposed to high glucose levels.

Daily, many people are diagnosed with type 2 diabetes but there are many who do not know they have the disease. Sugar, called glucose, is the fuel that keeps running a person’s body.

Without enough energy to maintain bodily functions, people with diabetes often manifest fatigue as first symptoms and warning.

Manifestations: In addition to fatigue, other signs of diabetes are excessive thirst, frequent urination, acute hunger, weight loss, irritability, vaginal fungal infections and blurred vision.

Investigation: There are two major types of diabetes. Rapid test – for blood glucose testing after a person has not eaten anything for 8 hours, made the first time in the morning. Following glucose tolerance test a person is taken blood twice before drinking glucose syrup and then two hours later.

Thyroid disorders

When thyroid hormone imbalances occur, even everyday activities can make you feel lack of energy. The thyroid gland is the size of a regular tie knot, is located at the front of the neck and produces hormones that control metabolism.

Excessive production of hormones (hyperthyroidism) accelerates the metabolism. Diminished hormone production (hypothyroidism) slows the metabolism.

Events: Hyperthyroidism causes muscle fatigue and weakness that can be observed especially in the thighs. Exercise such as cycling or climbing stairs become more difficult.

Other manifestations include unexplained weight loss, the continuous feeling of hot, increased heart rate, shorter menstrual flow menstruation – rare, sensation of thirst. Hyperthyroidism is most commonly diagnosed in women aged between 20 and 30 years, but can also occur in women and older men.

Hyperthyroidism causes fatigue, inability to concentrate, muscle pain even with light activities. Other symptoms include weight gain due to water retention, continuous feeling of cold (even in hot weather), and severe heavy menstrual flow and constipation.

Hypothyroidism is more common in women older than 50 years. At least 10% of women over 50 years will have at least an easy hypothyroidism.

Investigation: thyroid disease can be detected through blood tests. They are treatable so that any person who complains of fatigue and muscle weakness should make these tests.


Depression is a disorder that affects sleeping way, eating and perception of self and others. Without treatment, symptoms of depression can last for weeks, months or years. It is essential to recognize the warning signs and to seek help.

Events: Symptoms of depression vary from person to person. These are the most common: low energy level, sleep disorders, changing patterns of food, memory and concentration problems, feelings of hopelessness, worthlessness and negativity.

Tests: There are no blood tests to detect depression, but the doctor can identify it through a series of questions. If you experience some of the following symptoms for more than two weeks or if they interfere with your life, the best choice is to see a doctor. Your doctor may recommend a thorough physical examination to rule out other health problems.

- Fatigue or low energy
- Desire to oversleep or lack of sleep
- Persistent state of sadness, anxiety and feeling empty soul
- Decreased appetite and weight loss or increased appetite and weight gain
- Loss of interest or pleasure in activities that once triggered happiness
- Anxiety and irritability
- Persistent physical symptoms that are unresponsive to treatment, such as headaches, chronic pain or constipation and other digestive disorders
- Difficulty concentrating, remembering or taking decisions
- Feelings of guilt, hopelessness or worthlessness
- Thoughts of death or suicide.

Rheumatoid arthritis

Rheumatoid arthritis is classified as autoimmune disease that causes chronic inflammation of the joints or other areas of the body. Affects people of all ages. Cause is not known. It is a chronic disease that is characterized by periods of acute manifestation of the disease and periods of calm.

Events: Many of the symptoms (such as lack of energy, fatigue, decreased appetite and joint pain) are common in other diseases, including other forms of arthritis such as fibromyalgia and lupus.

Anemia and thyroid disorders that cause fatigue are some common found in people with rheumatoid arthritis. Rheumatology tries to detect at least four of these situations when trying to establish the diagnosis of rheumatoid arthritis:

- Stiffness of joints, in the morning, for at least an hour before the situation to improve,
- At least three areas in which tissue is inflamed, soft or there is a fluid accumulation,
- At least one swollen joint (elbow, middle finger, wrist, etc.) on both partial of the body
- Presence of nodules under the skin, bone erosion in the wrist or hand, detected after X-ray radiography

Investigation: thorough physical examination which the rheumatologist makes to a patient can provide some of the most valuable information about the disease, but there is also a test that confirms the presence of rheumatoid factor, an antibody in the blood.

In 80% of people with rheumatoid arthritis’s case, the antibody tests were positive, but the test is not conclusive.

Sleep apnea

You may suffer from sleep disorder if you wake up tired, no matter how much you rest. Sleep apnea is a condition characterized by brief interruptions of breathing during sleep.

The most common obstructive sleep apnea is when the upper airway closes or is collapsing for a few seconds, something that alerts the brain that need to wake up to breathe again. A person with obstructive sleep apnea may stop breathing for tens or even hundreds of times per night.

Events: Sleep apnea is often signaled by snoring and is generally followed by fatigue the next day. Because sleep apnea can trigger heart disease, hypertension and stroke is important to be detected.

Investigation: This involves spending a night at a clinic where you will be make a test to monitor the type of sleep, changes in breathing and present brain activity.

Chronic fatigue

Chronic fatigue syndrome is defined by two major criteria: severe fatigue that lasts at least six months, which is not caused by any disease diagnosed or do not improve with rest and at least four other symptoms that occur simultaneously or after development of severe fatigue.

The condition causes a powerful fatigue that sets in rapidly. People with chronic fatigue are too tired to continue normal activities and feel exhausted after minor efforts.

In chronic fatigue syndrome risk factors are not clearly understood, but most adults diagnosed are women aged 40-50 years and sometimes teenagers.

Events: Signs and symptoms of chronic fatigue syndrome are relatively specific: severe fatigue that lasts at least six months, which is not caused by any disease diagnosed or do not improve after rest and at least four other symptoms that occur in the same time or after development of severe fatigue, such as cognitive impairment, difficulty concentrating, muscle and / or joints pains, new types of headaches, sensitive to touch lymph nodes, sore throat, sleep poorly and malaise after physical activities. CFS has no known cause.

Investigation: There is no procedure that helps diagnose the condition. The doctor will make the diagnosis by excluding other diseases with similar symptoms, such as lupus or multiple sclerosis.

Treatment of CFS is based on treating symptoms that patients manifest. In adults, this syndrome hasn’t a very good development, but in children it gets better with treatment. For prevention of this syndrome will adopt a healthy lifestyle.



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