Food sensitivity confusion

My son is 10 months and I’ve been feeding him eggs and avocados since he was 6 months.. I’d say he eats eggs and avocados about 4 times a week but yesterday after eating it I noticed a hives on his wrist but I wasn’t sure if it was a bug bite or a reaction and there weren’t any anywhere else on his body and he was acting completely fine .. today he also had eggs and avocado and I noticed hives around his body not a lot just like one here and there but he’s acting completely normal.. is he starting to get a sensitivity to one of those or is it because I give it to him too much maybe? Has this happened to anyone? I’d appreciate advice please

Also I noticed after I nursed him (I also ate egg) he started to get hives again.. should I stop eating eggs too?

This is what showed up after nursing him but the others were circle shape