女儿5岁了晚上还wear nappy,这正常吗?

My daughter is 5 years old, but still have to wear nappy during the night. I tried to wake her up to go to toilet, end up both of up were very exhausted next day. now she is back to school, and I put the nappy on her again.I don't know if it is normal, if not, what should I do? thanks.