What is the life cycle of a wart?
This article has some good information. It's certainly more than I want to know about warts.


  Isolated warts may remain unaltered for
  months or years, or a large number of new lesions
  may develop rapidly in a short period of time. The
  development of warts is not predictable.
  Approximately 65% of warts disappear spontaneously
  within two years. The patient’s age and number of
  lesions do not seem to affect the prognosis.


There are many different types of warts and of HPV. Since warts cause a type of dysplasia their life cycle can be very variable and unpredictable.