I have the same problem bra
My Crotch Is Really Itchy, Can You Help?
Go nude at home and get air and sunlight to it.
You may have a yeast infection. You have to go on medication to get rid of it, or buy monistat3 it usually does the trick
Well ive found that soaking in a tub of hot water and bath salts will get rid of it but sometimes I have to get the knife