What are platelets?
Platelets are cells made in the bone marrow and then released into the blood. Platelets stick together to form blood clots. Blood clots help stop the bleeding when you have a cut or wound.Platelets in blood
Platelets forming a clot
The body has a normal process that creates new platelets and destroys old platelets. This process keeps the right number of platelets in your blood. In people with ITP, the process is not working the way it normally does.