My 17 month old son developed a raised, sandpaper-like rash on his torso and back about a week or 10 days ago. It is barely visible, but when you look closely, you can see tiny red bumps. It doesn't seem to bother him, although I do catch him scratching at it absentmindedly from time to time - but not enough to cause any breaks in the skin. He has just recently gotten over roseola (about 2-3 weeks ago), but this rash appeared several days (maybe more than a week?) AFTER the roseola rash disappeared. With this new rash, he currently has no fever and only a slight cough and intermittent runny nose (typical toddler stuff). The only documentation I can find online for fine, sandpaper-like rash is scarlet fever, although he has none of the other strep symptoms. Any idea on what this could be, and how long it will last? Should I rush him to the pediatrician? Advice is greatly appreciated.