B.M.
Hi,
Both of my sons had Mulluscum Contagiosum. My youngest first got it during the summer and we were told he may have caught from the local swimming pool from another swimmer. It can last, from what I researched, up to 3 years. He only had it 8 months but it was all over his torso, arms and legs. If the blister like wart busts it can spread. My boys like to wrestle and I think that's how my other son got it. It has an incubation period of about 3 months, so one may have it and not know it. It is a contagious virus in the wart family. My oldest son only had it about 5 to 6 months and not as bad. I ended up getting a perscription for Elidel (cream) b/c my youngest itched alot and busted them open. The cream helps soothe if itchy. I had to tell our school so it would be on record and they could apply the cream. Online I did find a site that claimed to have a faster healing process, but I just let it run it's course. It can leave large patchy scars, but niether of my sons ended up with any. I think the younger you are the faster it runs it's course and less scarring. That's about all I can remember, it was a few years ago. Hope I was a little help.