The possible causes of high hemoglobin in splenomegaly are eukaryocytosis, blood concentration or hypoxic erythrocyte compensatory and so on.
1. True erythrocytosis: excessive proliferation of erythrocytes causes an increase in the volume of whole blood and an increase in blood viscosity, leading to systemic vasodilatation and slow blood flow, which may cause vascular embolism, with headache, dizziness, tinnitus, vertigo, numbness of limbs, sweating, etc., and congestion of the face, ears, lips, palms, and conjunctivae in the early stage, most of them are accompanied with the phenomenon of splenomegaly.
2. Blood concentration: in strenuous exercise resulting in a lot of sweating or drinking less water, blood concentration can occur, hemoglobin will appear elevated phenomenon, when supplemented with water can return to normal.
3. Hypoxia erythrocyte compensatory: such as in the plateau area and chronic obstructive pulmonary disease for a long time hypoxia, resulting in a compensatory increase in erythrocytes, hemoglobin can be elevated.
There may be other reasons for high hemoglobin in splenomegaly, and you should go to the hematology department of the hospital, and the doctor will give you a correct judgment of the cause according to the specific condition.