K.S.
Good luck. Those suckers can have a 1-2 yr life span. We were told to wait it out but gave up at 9 months and went to the dermatologist. They painted each one with a concoctions that contained Blister Beetle goo (natural I guess but kinda gross...Dr called it a "1,000 year old cure").
A couple reasons to consider NOT waiting it out:
1.) They are very contagious. You don't want to be *that* mom that spreads a virus to other kids.
2.) They can go from a few to a major outbreak...And can jump to more conspicuous spots (face & hands)
3.) A major outbreak (I have never seen one...except on Google images) can be scarring.
4.) At 7 months, the virus is starting to wear itself out and so treatment now would be effective. Treating a very new outbreak (bumps that have been around for a couple months) might only be temporary. The bumps will come back even after treatment if the virus' life cycle is just too robust.