Rashes on the glans are usually not yeast. Instead, they are usually eczema or dermatitis. I suggest you try a cream containing hydrocortisone 1/2% or 1%. That should clear it up promptly after a few days of application twice a day. If it does, just stop and resume as needed. If it doesn't, you should show the rash to a physician.
Best.
Dr. Rockoff
regards...