Hello,
This kind of rash can be balanitis(an inflammation of the glans penis), balanitis obliterans xerotica and Zoo’s balanitis.It will only after examination can the diagnosis be confirmed.So pls consult a dermatologist for this.Treatment depends on the confirmation.
I hope that helps.Take care and pls do keep me posted on how you are doing or if you have any additional doubts.Kind regards.
Moniliasis responds to canesten,and is the commonest cause for your description.