We all write off the constant inexplicablefatigue for a busy and overly active way of life, filled with stress. And in most cases it is really so. But if, changing the way of life, revising your diet and paying more attention to sleep, fatigue still continues to be a constant annoying companion of life, which means everything is much more complicated than it seems at first glance. And this problem lies in the body itself, pointing to serious ailments. 1. Anemia Lack of red blood cells carrying oxygen from the lungs to tissues and cells is the most common cause of constant fatigue. Anemia is caused by iron deficiency (norms - ) and vitamins and is accompanied, as a rule,loss of strength, weakness and shortness of breath, insomnia and rapid heartbeat, pain in the chest and headaches. Often anemic people suffer from recent blood loss, internal bleeding or suffering from certain chronic diseases (rheumatoid arthritis, cancer, kidney failure). Women of childbearing age are most vulnerable to iron deficiency anemia, they suffer from constant fatigue more often than others. This is due, above all, to the loss of blood during menstruation and the increased need for iron during pregnancy and lactation. 2. Disease of the thyroid gland When the hormonal background is broken, even the usual easy everyday work can seem like hard labor. And even more so if there are any other serious diseases of the thyroid gland. Hormones (norms by reference - ), produced by the thyroid gland, controlmetabolic processes. Their lack (hypothyroidism), as well as excessive quantity (hyperthyroidism), lead to malfunctions in the work of organs and systems, disrupting the metabolic processes of the whole organism. All this affects the general condition and is expressed by a strong "causeless" fatigue (primarily in the hips), unexplained loss or weight gain, a constant sensation of increased or, conversely, low body temperature (with normal rates), an increase in heart rate, a malfunction in the menstrual cycle, increased thirst, constipation. If hyperthyroidism is more likely to occur in women between the ages of 20 and 30, hypothyroidism is more often diagnosed in women over 50 years of age. 3. Diabetes The inability of the body to use glucose (glucose levels - ) properly leads to its accumulation inblood, which, in turn, affects the general state of health and leads to constant fatigue - the first and main sign of diabetes. Unfortunately, type 2 diabetes was called the progressive insidious disease of the modern world. About its presence in the body, many people do not even guess, attributing its symptoms to completely different diseases or simply not attaching them much importance. Therefore, the constant fatigue, blurred vision, irritability, hunger and weight loss are explained by a busy working schedule and constant stresses, until strong thirst, frequent urination and yeast infections come into play. 4. Depression The human soul is also prone to diseases that sometimes are carried with even greater severity than any physiological ailments, and can last for several months or even years. One such is depression. Poor appetite, weight loss, depressed, apathetic condition, pessimistic mood, lack of interest in life and perception of it through the prism of dark gray tones - all this reduces vital energy, leads to changes in sleep and nutrition, negatively affecting, naturally, the internal processes of the body. Along with constant fatigue, there are problems with memory and concentration of attention, poor orientation in time and space. Depression, like a funnel, slowly but surely draws a person deeper and deeper, leaving him no chance of salvation by his own forces. And constant fatigue becomes thus not a symptom of an ailment, but a habitual way of life. 5. Rheumatoid arthritis This autoimmune disease is not always easy to diagnose in the early stages of its development. The complexity of the ailment is that the immune system acts against itself and affects healthy cells of connective tissue. The first in the list of "victims" are small joints, and with further progression of the disease irreversible damage to bone and cartilaginous tissue occurs. Against the background of severe fatigue, a person has loss of appetite, joint pain, swelling of the hands and feet. In addition, the loss of strength is exacerbated by related diseases, often accompanying rheumatoid arthritis - anemia and thyroid disease. 6. Apnea in a dream. Not only is the saturated regime of the day very tiring and takes all the forces, excessive fatigue can also appear due to normal, at first glance, sleep. Especially if this sleep is accompanied by frequent stops of breathing (more than 10 seconds). Such a disease was called apnea. Being a disorder that disturbs the structure of sleep, causing daytime drowsiness, slowing down thinking processes, worsening memory and attention, apnea leads to a decrease in working capacity and constant fatigue. Moreover, the list of diseases of the cardiovascular system is soon added to this list. 7. Syndrome of chronic fatigue The most mysterious cause of constant fatigue can be called chronic fatigue syndrome. On the causes of the syndrome, scientists continue to argue until today, without coming to a general consensus. Excessive decay of strength, which does not pass even after a long rest, along with headache, pain in muscles and joints, painful lymph nodes are caused by the development of neurosis of the autonomic nervous system. Often its first symptoms are confused with the symptoms of multiple sclerosis and lupus. But, in addition, CSA is considered an affliction of people in large cities, who have inappropriately balanced emotional and intellectual loads and physical activity.