My nephew got them at age 3 and they lasted about two years. We had no idea they would last that long if untreated! His pediatrician said not to do anything and they would go away on their own. After about a year he went to a dermatologist for a second opinion and they froze some of the bigger ones off. My sis wasn't careful at bathtime and his older brother (age 7) also got them, but his were much bigger and he said they hurt so he went to the derm and had them frozen off. In hindsight, when those first few appeared on my first nephew, we should've had them frozen off to prevent further spread. If the over the counter remedies mentioned here don't work, I highly recommend having them frozen off because they can last a long time.