The main causes of splenomegaly are infections, metabolic diseases. blood disorders. and liver diseases, etc. The most common causes of splenomegaly are chronic recurrent infectious diseases, such as schistosomiasis Malaria, tuberculosis, etc. The spleen can also be enlarged when suffering from blood disorders such as aplastic anemia, leukemia, etc. When the metabolism of the liver is abnormal. It can also be due to poor venous circulation. For example, cirrhosis of the liver, liver tumors, etc. may affect the spleen abnormality and result in an enlarged spleen. In addition, when the body’s immune function decreases, the spleen is likely to become enlarged. For example, patients with malignant tumors or AIDS are likely to have an enlarged spleen due to a chronic low immune system. Some rare infectious diseases can also lead to spleen enlargement. For example, typhoid fever, paratyphoid fever, black fever, etc. The presence of an enlarged spleen can be diagnosed by ultrasound examination of the spleen. In conclusion, the causes of splenomegaly are many and complex. Except for a few physiological ones, the cause should be sought under the guidance of a doctor and should be reviewed regularly to reduce the incidence.