Can A Baby's Anus Close Up? She Had A Severe

Can a baby's anus close up? She had a severe diaper rash - or that's how it was treated at our pediatrician- they said to put destin diaper rash cream on along w and now it seems her hole has disappeared. It's getting harder for her to go, and o my goes w help (legs up, pressure from a warm cloth) please help!! She's just a baby!!