Has anyone ever heard of mollescum?

My daughter had what looked like a rash on her leg of red raised dots that itched.it didn't go away despite applying over the counter creams so I took her to the pediatrician,and she said it was mollescum and that there was nothing she could prescribe me to take it away but gave me a website that offered an ointment I could order to try & get rid of it.I was willing to try so went ahead & ordered it,to the tune of $45 plus tax & s& h.Its still persisting & spreading.Dr.says only thing left to do is take her to a dermatologist & they would burn it off which will of course scar,& it's a painful procedure.the pediatrician also told me that it could be traced back to mats in a gym,as my daughter is in gymnastics.Any suggestions or anyone else ever had this problem please give me some insight before I make the call to the dermatologist.Thankyou