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A male asked about a male:

My son has a bruising behind one knee and in the crease of his forarm. irregular in shape? we have eczema in my family.

1 doctor answer1 doctor weighed in
Dr. Donald Colantino
Internal Medicine 62 years experience
Bruises: If you know that these bruises are caused by trauma like vigorous rubbing, then there should be no concern. If there has been no known injury and bruises (ecchymoses) appear elsewhere, a blood or clotting abnormality may be present and a physician should be consulted.
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Last updated May 22, 2017

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