Most cases of pancytopenia are due to aplastic anemia, a syndrome of pancytopenia caused by bone marrow hematopoietic failure. In addition, vitamin B12 deficiency, leukemia, myelodysplastic syndromes, and acute hematopoietic arrest can also cause pancytopenia. Pancytopenia can occur when there is a decrease in the number of whole blood cells, mainly due to the number of red blood cells, white blood cells and platelets in the peripheral blood are lower than the normal range, it is a viral infection, drugs, radiation and autoimmune system abnormality damage as the main factors. Most patients do not have obvious manifestations in the early stage, and when the condition worsens, they may show pale face, generalized weakness, panic and shortness of breath, and in serious periods, they may have high fever and bleeding from skin and mucous membranes. Patients with Pancytopenia should be detected and treated early so as not to delay their condition, and it is recommended to go to the hospital in time to improve the relevant examinations to clarify the cause of the disease, and treat according to the cause of the disease.