what would cause my 2 yr old son to wake up in the middle of the night crying with his feet hurting and saying they are hot, and they were hot from his feet to his knees as if he had fever in them, and would not let me touch them. He is 2 weighs 29lbs. height in 30 inches, his medical history is heart murmur(not a bad one), ear infections(has had tubes), and awful acid reflux.