It is so weird you posted this, because my 4 year old daughter is having the same issues. She wad complaining of leg pain and now has a bumpy pimple like rash on her face, wrist, and up and down both legs. Did you ever get an answer?
Try some A&D cream first...The original ointment.
http://www.myadbaby.com/
http://www.myadbaby.com/products.html