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

15. Sepsis

When the body goes into overdrive fighting an infection, it can trigger widespread inflammation that damages blood vessels and reduces platelet levels—a deadly combination. Petechiae in sepsis are often a precursor to more extensive purpura or bleeding under the skin, sometimes progressing to a condition known as disseminated intravascular coagulation (DIC). If you or someone you love develops petechiae alongside confusion, rapid heartbeat, fever, or labored breathing, seek emergency care immediately. Time is critical in managing sepsis, and petechiae may be one of the only visible early signs that the body’s systems are beginning to fail.