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This is where the internet fear-mongering usually starts. It is true that in rare cases, frequent, unexplained bruising may be associated with disorders affecting blood clotting or the bone marrow. Conditions such as leukemia, lymphoma, severe liver disease, or platelet disorders can cause bruises to appear easily because the body’s ability to produce or use blood cells is impaired.
Doctors do not diagnose these conditions based on a bruise. They evaluate a complex combination of symptoms, physical examination findings, and blood tests. If a serious condition is present, your body will usually be sending you a chorus of other warning signals, not just a quiet bruise.
Red Flag Symptoms: When to Schedule a Doctor’s Visit
Petechiae are tiny, pinpoint red or purple spots on the skin that look like a rash but do not fade when you press on them. This indicates bleeding from the very smallest capillaries.
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