My son, 5 yrs old, fell off bed and hit forehead 2 nights ago, resulting in a nasty lump on the head. I am concerned because today his forehead feels VERY hot to the touch, especially when compared to my other two children. Three times today I have taken his temperature with full expectaion that he was running a fever, but no fever was detected. He is also having a very persistent cough and congestion but this appears to be allergy related as it is similar to what happened this time last year. I am concerned the hot head could be the result of the trauma to his head???