7 year old girl, red spot on cheek, no itching, size of zit, has been present for 5 days and no changes. What could this be?

Umm, hard to say. Skin rashes are most difficult to diagnose without actually examining them. Can you feel the spot? Is it crusted? Ever have it before? Since the area is now raising concern, perhaps it would be wise to have your pediatrician or dermatologist examine. Then specific treatment could be discussed with more accuracy. Pimples, especially if increasing in number, in 7-yr-old poses bothersome questions...