Bulldogs World

About a month ago my husband took Fatboy in to have his nose checked out.  It had green in the cracks of his dry nose.  The vet said it was normal and to moisturize with Vaseline.  Well we've tried this, and now this is what we are dealing with.  It looks it's infected.  Does anyone know what is going on here??  And what can I do to make this better?