Hello and thanks for your question.
It's my first priority to help you.
Well as you describe,it sounds sebaceous cyst.
I would recommend some self care measures like
Do cool water sitz bath with
betadine solution twice a day for 5-10 minutes.
And afterwards,apply OTC 1%
hydrocortisone cream mixed with
bacitracin ointment twice a day.
Clean the area with DIAL soap and use OTC Abzorb powder afterwards.
You should avoid frequent washing.
And keep the area dry and clean.
Wear loose fitted cotton clothes to prevent friction.
Take OTC
Motrin and
Claritin for few days.
Abstain from sexual activity for a while.
Avoid any scented soap,lotion on affected area.
Avoid shaving,trimming.
Hope this helps.