Do you lie on that spot alot... I mean a whole lot?
It is not common for people who move around, even in bed to get bedsores.
It could be a bruise or broken blood vessel in the muscle.
I'd have a doctor check it out. There is an inflammatory condition called erythema nodosum, which leaves big bruise like skin conditions.
http://en.wikipedia.org/wiki/Erythema_nodosum
I am trying to recall... didn't you have a paraneoplastic result recently in testing. If so, this could be related.
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Weezie looking at petunias 8.25.2017
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