Thanks Angel for further information and photo.
The possibilities of the diagnosis are;
1) Mild grade chronic hair follicle infection; you may apply Betadine solution (available without prescription) twice a day for 5-7 days which may resolve it. If this is not effective, you may need a course of antibiotic.
2) Sebaceous cyst; this is very common on scrotum. If this gets inflamed (pain, tenderness), this may need a removal by minor surgery which is an office procedure.
Please feel free for your follow up questions.
I would be happy to assist you further, if you need any more information.
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