Hi.. Thanks for the query.. A bump in pelvic area that oozed out pus and has a hair grown through it seems to be due to Ingrown hair and it occurs when a hair curls backwards towards the skin and in place of growing upwards it grows back into the skin.. Other causes can be hair follicle infection or folliculitis.. The symptoms that you are explaining does not look like genital warts or herpes.. I would however suggest you to consult a General Physician and get evaluated and he can do a thorough clinical examination and it seems mostly sufficient to confirm the cause.. You can be advised to clean the area with antiseptic solution and apply a combination of triple antibiotic ointment and steroid ointment over it.. You can be advised to take a short course of antibiotics.. Keep the area clean and dry.. Hope this helps.. Regards..