You may have given the child your sickness, or It sounds just like what my son had a few weeks ago, Hand, foot and mouth disease. He said that nothing hurt, that he felt fine. But the rash was found when he awoke one morning from head to toe. It was on his face, belly, knees, and knuckles,etc. I took him to the Dr.s and she told me what is was and I couldn't believe it. I thought it was an allergy to soap. She told me that there wasn't anything that I could do, to let it run it's course and that it is extremely contagious, to keep him home. He later got a low fever and his voice changed from his glands being swollen. You might want to take the little one to the Doc. It might be something else...?