Ds1 is 3.4 and today had one bright red hot cheek while the other was cold. It had calmed down by this evening but just wondering what this might have been, as he has got all his teeth. He didn't have much of an appetite today either and wasn't quite himself. Same thing happened about a month ago and lasted a day again. Wondered if it was a virus but seems an odd symptom with only one cheek affected?