Slapped Face Syndrome is also called Fifth Disease. According to the National Library of Medicine, the symptoms can include a mild fever, cold symptoms and a red rash on the cheeks, arms, legs and trunk. Adults who get it might also have joint pain and swelling. Like kylesmom said, it usually isn't treated because it goes away on its own. The really good news is, most people who get it once become immune to it!   But the itchy scabs might be caused by something else.   In cases like this, your best bet is to make an appointment with your pediatrician right away. No one can tell you online what might be wrong with your child, so you'll need your doctor to know for sure. Ask about Fifth Disease and see if it may be the issue.   If you or your doctor suspects allergies, there are several tests that the doctor may run to see if that's the case. It's not easy to test for allergies. Click this link to find a lot of useful information about allergy testing.   Good luck!