Well my daughters didn't have it but my sister whom is 46yrs old. got it. She is married and has a 8 yr. old son, and everyone had to use the prescription cream as well. When she found out she had it and what it actually was, she had already had it for about 3wks. After she received the medication for it, her's cleared up in about 3wks total. I do know that the more you scratch the more it spreads, and anywhere you scratch, that's where it spreads to. It varies on the time that it takes to clear up. It can take a few wks. or it can take months. It all depends on how quickly you contain it and keep it from spreading to other people while getting medication for it. I think it just all depends on the person and how much you irritate it. Also you want to change all your linens and vaccum completly in your house, and wash all laundry that could contain any of the scabies.