Hemoglobin 96g/L is a mild anemia. In terms of hemoglobin concentration alone, hemoglobin 96g/L is not serious, and the patient will not show symptoms of severe anemia; the patient may have mild pallor, weakness, and feel a slight decrease in energy after exercise. However, whether or not hemoglobin 96g/L is severe depends critically on the cause of the anemia. If it is caused by simple iron deficiency anemia, the consequences are often not serious and the patient will recover after iron supplementation treatment. However, if the patient is an adult male, previously healthy, and has hemoglobin 96g/L, it is necessary to be alert to whether the anemia is caused by gastrointestinal tumor, because many adult males often have anemia symptoms due to gastrointestinal tumors, such as gastric cancer, esophageal cancer, colon cancer, etc. If the anemia is caused by digestive tract tumor with hemoglobin 96g/L, the consequence is very serious, and you need to have a timely examination and surgery or other treatment as soon as possible. Certain malignant tumors of hematological system may also show mild anemia in early stage, such as myelodysplastic syndrome, chronic aplastic anemia, etc. Therefore, patients with anemia need to go to hospital for examination as soon as possible to clarify the cause of anemia and avoid delaying the disease.