 [ Symptoms ] what causes high fever sores on lips and in mouth general malaise patient is 15 years and has been treated 9 days patient began with sore throat and fever which quickly shot to 103  104 he was taken to emergency room and the diagnosis was possible hand foot and mouth but no sores on his hands or feet he has been treated with azithromax for 9 days now and the fever is subsiding but the sores on and in his mouth gums tongue and back of throat are raw open oozing and very painful he still is unable to eat no more than milkshakes gator aid also the smell is becoming bad like rotten meat [ Disease ] sounds like the diagnosis is right my daughter had it for 2 weeks and only on gums tongue and lips never on her hands or feet very painful but it did go away she was 2 though