I HAVE BEEN DEALING WITH THIS PROBLEM FOR YEARS. A FOUL SMELL AFTER SEX WEATHER I CAME IN THE WOMAN OR NOT. I STARTED USING CONDOMS WITH MY GIRLFRIEND AND THERE WAS STILL A TERRIBLE SMELL AND SLIGHT INFECTION THAT WOULD LASTS DAYS SOMETIMES WEEKS. THIS WENT ON FOR YEARS BAFFLING DOCS. EVEN WITH A CONDOM. TILL I FOUND THE ANSWER!!!! H PYLORI !!!!! I HAD H PYLORI AND WHEN MY SALIVA MADE CONTACT WITH MY GIRLFRIENDS VAGINA IT CAUSED THE INFECTION AND FOUL ODER. YOU BOTH CAN HAVE H PYLORI. GET THE TEST ITS SIMPLE AND EASY. IVE BEEN SEARCHING FOR THIS ANSWER FOR YEARS. HOPEFULLY IT HELPS YOU GUYS AS WELL. IF YOUR PARTNER HAS H PYLORI CHANCES ARE YOU DO AS WELL. YOUR SALIVA OR HIS WILL CAUSE THE INFECTION. TRY SEX WITHOUT A CONDOM AND ZERO SALIVA FROM EITHER OF YOU. BAM!!!
Hi there and welcome. Well, probably the best thing to do is to find its source. I recommend seeing a doctor to determine what is causing it. Is it bacterial in nature? That requires antibiotics, fungal in nature? Are the folds getting material in them that smells requiring a different cleaning method? Fishy odor? Sweaty smell?
You can try a soft washcloth with some antibacterial soap to clean the area on the outside to see if that helps. But do NOT douche as that is considered unhealthy by health care professionals and leads to yeast build up and issues wth the natural flora within your vagina.
But a doctor is best suited to help with this matter by examining you. good luck