rash

[foundintranslation]

ds (just under 8 months) has come out in a faint red rash on his back and tummy.
Done the glass test - it fades [relief emoticon].
He doesn't seem ill. He's been a bit whingey and farty over the last couple of days and I posted about whether he might have a tummy upset. Is alert, crawling around, feeding, playing.
We introduced banana yesterday - could it be a reaction?
TIA

Could be sweat rash, mild reaction to banana or just that he has a mild virus. Sorry not very helpful.

Thanks lucy.
Quick bump as am not all that concerned but it's out of the ordinary.

bump for evening crowd.
rash has got marginally bigger/worse, still more faint than angry red. He still seems well, bit grumpy but feeding (even eating) and playing. No temp.

p.s. did glass test again and I couldn't see, but dh says it faded.