20 Cause of Petechiae and What You Need to Know About Them

19. Autoimmune Thrombocytopenic Purpura (ITP)

ITP is an autoimmune disorder where the body mistakenly attacks its own platelets, resulting in low platelet counts and frequent bruising or petechiae. The condition may develop after a viral infection or emerge without a clear trigger. It’s most common in children and young adults, though adults can also be affected. Petechiae often appear on the lower legs, gums, or inside the mouth. Mild cases may resolve on their own, but more severe ITP might require corticosteroids, IVIG, or even spleen removal. Monitoring platelet levels is crucial for managing flare-ups and preventing more serious bleeding.