Thanks for posting your query at DoctorSpring.com. I can understand your concern.
This looks like folliculitis which is a bacterial infection of the hair follicle.
Application of neosporin cream twice a day for a week week resolve it. It doesn't look like a STD. You can discontinue the application of hydrocortisone cream.
Hope this helped, Please let me know if you have any queries.
Patient replied :
Thanks very much for your response Dr. Banodkar! I really appreciate your help. I'll buy some neosporin to use instead.
Do STDs, like herpes, typically form in groups of small blisters and are painful? I'm just wondering.
Thanks for your reply.
Herpes presents in the form of fluid filled blisters which are grouped together and are painful.