Hello,
I have gone through your query and understand your concern.
Your query is ambiguous and incomplete.
You said that it looks like
acne, I suspect it to be a infected hair follicle.
As this the hair rich area, probably, it might be a infected hair follicle.
This is usually caused by staphylococcal bacteria.
It is not a
sexually transmitted disease.
You need the examination by your
primary care physician to confirm the diagnosis.
You need antibiotics like
amoxycillin to get rid of this infection.
Wash the area with the warm water.
Sitz bath will be helpful.
Hope this helps.
Please write back for further queries.
Wishing you good health.