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I promise you I'm not a troll. I have name changed though. Well, wouldn't you?! I've had BV before. And that was a slightly different smell (TMI?) This happens very specifically after I eat fish. It must be to do with that.
If I eat garlic onions or curry type spices. The following day if I sweat a lot at work or the gym when I go to have a wee my bits do smell of those particular odours. Can't say I've ever noticed it with fish or seafood. We do sweat out certain odours depending on what we eat. Also asparagus makes a person urine smell strong the following day.
It may be bacterial vaginosis. Or it could be a condition called fish odour syndrome (really). People with FOS have a compromised ability to metabolise trimethylamine - a compound found in fish, and also other foods e.g. eggs I think. As a result they excrete this compound in their sweat etc and it smells of rotten fish. Its a genetic condition, if you inherit two copies of the gene (one from each parent) you get the full blown FOS. But if you have just one copy of the gene you can have a milder form where you may just have fishy smelling vaginal discharge when you eat fish.
I have this and I think its tmau or a version of it I can't eat fish , bread, nuts, cauliflower, broccoli , peas, eggs, beef steak the list goes on but the smell always seems to be coming from vagina even though im very clean.been to gp so many times and fobbed every time and been tested for everything except for tmau .I was told im imagining it but even my kids notice the smell.since I have cut .those food out I rarely suffer with it.