hi; it probably depends on if it is simple bacteria or fungus so u can look them up, look for pictures
if fungal; there r 3 main active ingredients and Clotrimazole (as mentioned) is 1, look on the ACTIVE INGREDIENTS to see;
then u have better in some ways; like women use monistat or vagisil
and then u have Rx items like fluconozole (difucan) which comes in 50, 100, 150 mg and often a single 150 is prescribed for a yeast infection
NOW something else THAT U can do; go buy some probiotics and mix a capsule into what ever cream or anti itch, anti fungal etc as the probiotics will help stop the itch because they like to eat fungus
so do u have gf that has yeast infections, u may have got it there,
it could just be what is commonly referred as CROTCH ROT
if u r young and healthy and have no insurance then if such does not work, u have to go pay a dr etc.
good luck