Well, now I know why pharmacists don't do surgery or treat people in hospital ;-)
That looks like a hemorrhagic dermatitis.
This can be caused from many conditions: virus infection, tick bite, systemic infection, severe vascular problems....all sorts of things....
The bot***** *****ne?
You really need to see a doctor -- today would be good -- for a complete exam, some lab tests and a good going over.
If you can't see your doctor today (since I think it is already afternoon on your side of the Planet) a visit to A&E would not be unreasonable.
Does this make sense to you?
I am happy to be able to help you today. If you would be so kind, please help me get credit for my efforts in answering your questions and press the excellent feedback button for this encounter. And, don’t forget, I work for tips. I would also be happy to continue to answer any more questions you have until we have resolved your concern.
Dr. Rick MD FACS