Welcome to HCM,
Gention violet is good medicine for thrush
very widely used in the past. But now so many new comers doctors might not knowledge of GV.
It is well tolerated and has less side effect, we have used in oral application in the thrush.
so I do not think there is irritation due to this.
If thrush is there you can apply Mycostatin
oral tablet crushing and apply.
You may take oral anti fungal like Flucanozole 150 mg once in a week for 4 weeks.
Rule out local bacterial infection due to itching.
You can apply triple acting cream.
Keep local part neat, clean and dry.
Ok and bye.