Human beings evolved the immune function in order to combat the effects of foreign or intrinsic negative substances on the body. Once the body recognizes bad molecules in the bloodstream, such as various bacteria, viruses, tumors, parasites, etc., it begins to mobilize the body’s immune units to combat them. And this main battlefield lies in the spleen. The basic cause of immune thrombocytopenia lies in the fact that platelets, which are a normal component of the body, are mistaken for bad molecules. The process of misidentification is very complicated, here is a simple example to illustrate for your understanding, our body is very intelligent for foreign bad molecules to identify, first of all, this bad molecule is dismantled, this is a leg, that is an arm, similar to this, and then there are antigen-presenting cells, equivalent to the police workers out on the scene to these arms and legs to B lymphocytes, equivalent to forensic science, let forensic science The B lymphocytes to take pictures, is to make antibodies, and then let the immune cells against the photos to attack the bad guys. In a patient with immune thrombocytopenia, his immune cells get a picture, for example, of an arm that looks like his own platelet arm, and then his own platelet suffers. That’s how the disease arises.