my 3yr old boy has a temp of 101.7 under the arm, he's feet are warmer than his head, he keeps saying owe my feet, hot. and they are red on bottom and really hot. he also has runny nose and some sneezing and a cough once and awhile. the rest of he's body is warm, just not as warm as his feet. is this something I should be concerned about, or just let it run its course?