There are many causes of physical fatigue and mental lethargy in daily life, the most common of which are the following: 1. Physiological factors, such as overwork, mental stress, disruption of work and rest, and menstruation, etc., but they are transient and do not require much treatment, and can be effectively relieved by adequate rest or appropriate exercise. 2. Viral colds, one of the most common clinical diseases, can cause physical fatigue and weakness, as well as muscle aches, dizziness, sore throat, fever and other symptoms. It causes fatigue and weakness, muscle aches, dizziness, sore throat, fever and other symptoms, and an increase in lymphocytes in routine blood tests, which can be relieved by active antiviral treatment. 3. Iron deficiency anemia, which is more common in women, has symptoms such as fatigue and drowsiness, as well as pallor, memory loss and dizziness, can be clearly diagnosed by perfecting routine blood tests, and its treatment is mainly The main treatment is to actively supplement iron.