2/3 resolve within 2 years.  In young children, higher spontaneous clearance.  In systematic review, only salicylic acid and aggressive cryotherapy seem to be effective.  Both are user dependent.  In RCT between the 2 and conservative management, no difference detectable after 13 weeks.  So watch and wait, unless causing a lot of pain.

Perianal warts can be transmitted vertically from mother at birth, or potentially from carers changing nappies.

Warticon cream is podophyllotoxin. Else Condyline paint.