Feeling tired and lazy one day may be caused by the occurrence of severe anemia, hypothyroidism, granulocyte deficiency or severe thrombocytopenia and other diseases. When severe anemia occurs, the organs, tissues and cells of the human body lack sufficient nutrition, energy and oxygen, and there will be weakness, dizziness, loss of appetite and other clinical symptoms, which need to be further improved to clarify the routine blood tests, and if there is indeed severe anemia, it is also necessary to further improve the six grades of anemia to clarify the cause of anemia. When hypothyroidism occurs, the decrease or lack of thyroid hormones in the body will lead to symptoms such as fatigue and loss of appetite, etc. It is necessary to further improve the thyroid function quintuple, thyroid antibody triple, thyroid ultrasound and other related examinations to clarify the cause of the disease, and then for the cause of the disease treatment at the same time, oral thyroxine tablets for replacement therapy. When the patient has granulocyte deficiency or severe thrombocytopenia, he/she may also have symptoms such as fatigue etc. Complete the blood routine, bone marrow puncture and biopsy and other relevant examinations to clarify the cause of the disease and then treat the cause of the disease, and may also be infused with homogeneous platelet suspension to temporarily raise the platelet count. In addition, patients may also experience symptoms such as fatigue and laziness after prolonged fatigue or insomnia. It is recommended that the patient should consult a doctor in time to complete the relevant examinations to clarify the cause of the disease and then treat the cause of the disease.