Chronic Fatigue Syndrome is a putative syndrome characterized by progressive weakness in all muscles of the body, prolonged sleep or an irresistible desire to sleep (referred to in some sources as “hypersomnia”), loss of appetite and sudden weight loss. A doctor may suspect this syndrome when examining a patient with complaints of constant fatigue of unknown origin. The diagnosis is usually made on the basis of a clinical examination, which allows one to differentiate chronic fatigue from other diseases. Symptoms characteristic of the syndrome may include sleep problems, chronic headaches, asthenia, depersonalization and memory loss.
Chronic fatigue syndrome is a rather controversial area of medicine. At the moment, it is not officially considered as a medical disease, it is recognized as a group of diseases of the nervous system and is considered a manifestation of other diseases such as depression, fibromyalgia, mononucleosis, multiple sclerosis, other types of immunodeficiency and many other neurological, endocrinological and rheumatological diseases. Many researchers are focusing on the role of Epstein-Barr virus in the development of CHC. There is a widespread view that SNC is part of a spectrum of a single immune pathology, common with severe acute infections (hepatitis C, HIV infection), chronic myeloproliferative diseases, tumors, histiocytosis and many other severe pathologies in which the role of interferon is similar (type 1) .