The causes of adults feeling particularly tired are mainly divided into organic diseases and psychogenic diseases. Psychogenic diseases usually have clear causes, such as unhappy work life, emotional entanglement, sudden changes, etc. In addition to feeling particularly tired, there are also symptoms such as sleeping a lot or insomnia, loss of appetite, dizziness, panic, sweating, etc. Organic diseases mainly include several conditions: first, heart failure, generally with a history of heart disease, in addition to feeling particularly tired, there will be chest tightness, chest pain, shortness of breath, general swelling and other symptoms. Second, airway diseases, mainly including bronchial asthma, chronic obstructive pulmonary disease, etc., accompanied by shortness of breath, dyspnea and other symptoms of oxygen deprivation. Third, hematological diseases, including moderate to severe anemia, leukemia, lymphoma, etc., mostly accompanied by fever, enlarged liver and spleen lymph nodes and other symptoms. Fourth, metabolic diseases, mainly including diabetes, hyperthyroidism, etc., mostly accompanied by symptoms such as wasting, easy hunger, increased meal size and weight loss.