Is my mole infected? (photo)

Thanks for your question- without seeing it in person its difficult to tell but I wouldn't want to excise this area. I would look at laser vs. dermabraision to help this issue as this may be able to smooth the area. PRP could be added to the mix for improved results.  Hope this...

This is not a normal symptom.  I would recommend getting an evaluation.  Sometimes moles can bleed, and sometimes other lesions can actually fall off.  But the pain in your shoulder and neck is more extreme than would be expected. 

Cancer vs potential cancer require different types of surgery. That is why the testing step is done first.