Lack of energy and insomnia, which is a non-specific clinical manifestation, most of the cases are recent such as more stress, more intense work, excessive exercise, and lack of sleep, staying up late, irregular or unbalanced diet, not having regular meals, excessive use of spicy and greasy food, excessive smoking and drinking. If caused by these factors, proper lifestyle adjustment will get significant relief. If it does not improve or even worsens over a long period of time, and other clinical manifestations occur, such as significant weight loss and more unsatisfactory appetite, it may be necessary to go to the hospital for further examination. Be alert to certain inflammatory diseases, like chronic infections and tuberculosis, as well as endocrine diseases and metabolic diseases, like diabetes, thyroid disease, hyperthyroidism and hypothyroidism, which may cause weakness, lack of energy, and even affect sleep. In addition, certain tumors and cancers also need to be alert. Some diseases of the blood system, such as anemia, can cause weakness, decreased energy, and even affect sleep. If these clinical symptoms are not relieved, although they are not specific and it is impossible to think of a specific disease, you should go to the hospital and under the guidance of a doctor, for example, the doctor may ask about some other related symptoms, do a simple physical examination, and may do some biochemical tests, including routine blood and urine tests, to clarify the causes of weakness and insomnia and give the right treatment.