I get them pretty regularly if I eat a lot of wheat (say, toast for breakfast, sandwich for lunch and pasta for dinner). They always come on in the early evening and are gone by the morning. I take antihistamines if they're so itchy I can't sleep, otherwise a cold compress and some dermaid cream is enough to settle them. I try now to limit my intake of wheat Hope your LO doesn't suffer too much and you can quickly find out what's causing it.