There are many reasons for frequent fatigue, and both physiological and pathological reasons may lead to frequent fatigue. Physiological causes of fatigue are mostly temporary and can often be effectively relieved by adequate rest. For pathological factors, fatigue may be due to the presence of other diseases, such as nutritional and metabolic diseases, infectious diseases or tumor diseases. 1. Physiological factors: if you often feel tired in daily life, it may be due to physical or mental labor is too heavy, there may also be too much mental stress, can not be soothed and relaxation, and then temporary fatigue, often through the rest and release the pressure, relaxation, adjusting the routine of rest and relaxation, most of the fatigue will be relieved. 2. Pathological factors: clinically, there are some people feel often tired from other diseases, such as nutritional metabolic diseases in malnutrition, diabetes, hypoglycemia, obesity, thyroid disease, infectious diseases caused by viruses, bacteria, fungi and other infectious diseases will aggravate the feeling of fatigue, oncological diseases may be due to the weakness of the body leading to frequent fatigue. After eliminating physiological factors that cause frequent fatigue, it is recommended to consult a doctor in time to clarify the cause of the disease and follow the doctor’s instructions for treatment.