Years before I knew him, MFWHTBAB stopped eating prawn crackers, because they made his lips swell up. Not anaphylactic levels, but visible and uncomfortably tingly.
Last week, we were out for a meal, and he had a similar reaction, just one side of his top lip. Couldn't place the cause, I wondered if it was the mushroom risotto, but he eats mushrooms normally ok.
Last night, at Mum's, we had a glass of white wine with dinner, and it's happened again. He doesn't normally drink white, preferring red, and we wondered if that was the cause, and maybe there had been some white wine in the risotto.
Is it possible that there's something in white wine, but not in red, which he drinks with no ill effects? Nothing else he ate last night was unusual.