He was perfectly fine until about midday yesterday when he suddenly said he felt tired and had developed a high temp. This came down with both calpol and ibuprophen. once the drugs wear off then the temp returns. He says he just feels poorly. No other signs other than the temp that anything is wrong. i.e no rash, cough, cold, tummy upset, just nothing.
He is eating and drinking when the temp is brought down. He is 3.
Any ideas?