Immune thrombocytopenia (ITP) is a fairly common blood disorder. Both children and adults can develop ITP.
Children usually have the acute (short-term) type of ITP. Acute ITP often develops after a viral infection.
Adults tend to have the chronic (long-lasting) type of ITP. Women are two to three times more likely than men to develop chronic ITP.
The number of cases of ITP is rising because routine blood tests that can detect a low platelet count are being done more often.
ITP can't be passed from one person to another.
The NHLBI updates Health Topics articles on a biennial cycle based on a thorough review of research findings and new literature. The articles also are updated as needed if important new research is published. The date on each Health Topics article reflects when the content was originally posted or last revised.