My mother is 85 .Her temp. is 102.9. This is the third day her temp. has risen toward evening. Her temp. was normal @ 1 when I got home from work. She doesn't seem to have any other symptoms . She is just very tired and I had to talk her in to eating as she said she wasn't hungry. Are these symptoms serious enough to go to the ER or should I monitor her to see if she gets worse.