No matter what it is you shouldn't pick it and definately shouldn't cut it open. It sounds like an ingrown hair. Warm compressed as much as you can throughout the day, avoid touching, picking etc. Keep it dry otherwise, maybe even a triple antibiotic ointment will help inbetween warm compresses to avoid a secondary skin infection.
Good Luck...
Jessica
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Take Care and God Bless
RareEndo
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