Possible shingles: This could be the beginning of a shingles outbreak. It could also be a sty or other bacterial infection. The tenderness under your jaw may be a swollen lymph node. Best to get a thorough exam ASAP. Shingles is best treated with anti-virals early.
Answered 4/24/2016
1.4k views
Multiple possibility: Several possibilities: inflammatory processes like infection or autoimmunity, if dark may be blood disorder, could be allergic. Difficult to pin down with your description.
Answered 4/24/2016
1.4k views
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