What Causes Petechiae?

Petechiae are flat spots that may appear as a result of bleeding underneath the skin. The spots are typically reddish when they first appear, and they might become purple, blue, or brown with time. Patients may notice single spots in the initial stages, and these may develop into clusters of petechiae in the later stages. When pressure is applied to petechiae, they will stay the same color. Most petechiae are not painful and do not itch. Doctors can diagnose petechiae with a visual examination, and they will need to perform a physical examination of the patient to establish the underlying cause for the petechiae.