3 1/2 yr old round bruise on knee quarter size with lighter circle in middle. Fever 24 hours w/ resp Symptoms cough, congestion. Had sinus infect 5 wks ago treated with amoxicillin and cleared . My concern is the bruise which seem to just have appeared and never seen one on him like this. He says his head hurt.. Was trying to wait to see the pediatrician but am nervous since just saw this bruise... As an RN my mind is running course.. Should I continue Tylenol for fever and see me during office hours?