Question: What medical condition cause small dark bruises on the upper thighs? I am a 43 year old man, I sometimes get unexplained bruises on my upper thighs near my groin. These bruise are usually about the size of a quater.

Answer: see a doctor. unexplained bruising i have read somewhere is the sign of kiddney issues\n\nhttp://health.yahoo.com/ency/healthwise/aa65427/aa65436%20;_ylt=AhV41fG4.w2PX2jtPmk0NTbxurcF
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