Hello, thanks for using health care magic. Its interesting to know that you are sure its not an std. Possible causes could include a folliculitis or a bartholin abscess. Folliculitis is an inflamation of a hair follicle which is usually bacterial in origin and can progress to pus formation. This is common following shaving or traumatic lesions on the ge- nital region. Bartholin cyst develops when the drainage of the gland is blocked leading to accumulation of fluid in the gland that produces pain and might become infected to form an abscess. Drainage of bartholin abscess is done in a special technique known as marsupialisation to prevent re-occurrence. However, pus fill cavities should be drained. Thus, it is necessary to see a doctor to rule out the possibility of a bartholin abscess. If its not a bartholin abscess, normal wound dressing after incision and drainage would do. Hope this helps you Dr Achuo