W.W.
My oldest son had it when he was 2. It took about 9 months for it to go away. We did NOT use the "juice" as the dermatologist did NOT recommend it with his age.
We put the large band-aids on his legs (he had it behind his knees) to keep him from scratching/itching them.
Keep the clothes clean. Wear pants. (my son started his in the summer!!)