Allergy to peanut- nappy reaction, advice please?

[giftswap2021]

Hello, I am looking for some advice please?
I have a 3 month old baby boy. I am breastfeeding him, and i had eaten a peanut butter and jam wrap, and noticed he has a forceful explosive nappy, that was quite unlike his other nappies, it looked exactly like peanut butter, thick, brown and sticky.

I thought it was maybe a once off, maybe was due to having his injections etc, and then today ate another peanut butter wrap and the same nappy has happened tonight.

My question is: is this a symptom of a peanut allergy, as he has no other symptoms?

His sister has a dairy allergy and I have gone dairy free in the assumption he will be dairy free also. But this peanut reaction has me stumped.

The only other time he had a funny nappy was after I ate a Nomo dairy free caramel bar, I wonder if there is anything in there he is allergic too also?

I think it could be, yes. None of DCs allergies manifested like that but they are all different.

Just had a look at the NOMO caramel bar ingredients and the one that jumped out at me was sunflower. Maybe try some sunbutter and see if he reacts?

At 4 months you can introduce allergens if you want.

My understanding of allergies is that you can be genetically predisposed to having allergies but not to specific allergies. So, if dairy allergies are in the gene pool he may be at higher risk of allergies but it's just as likely to be a nut allergy as a dairy allergy. Make sense?