yeast infections can just happen whether the person is having sex or not. i guess that is is possible for sexual activity to be contributory but it isn't necessary. there is really no way for me to know if your girlfriend has yeast or something else without an examination so if there is a concern she will need to see her medical provider. in the meantime she can treat a simple vaginal yeast infection using monistat vaginal cream or an equivalent product - available over the counter.
my girlfriend develop a yeast infection after we had sex. this is her first occurance in years. could sex have cause it. my girlfriend develop a yeast infection a couple of days after we had sex. this is her first occurance in years. a few weeks before i had sex with her i had protected sex with another woman. could sex have cause it? how do i or we know if its something other than a yeast infection? will it re-appear if we have sex again?