Dreaming of a hospital can signify an emergency or something drastic that has happened. Trips to the hospital usually come when something physical has occurred. Thus, the dreaming of a hospital may be a sign of shock that has come into your life, something unexpected and unplanned that requires immediate attention. Also, it can be interpreted as a sign that you need to try your best to improve your health both mentally and physically.
Of course, it is not necessarily a bad event. While most trips to the hospital are for emergency medical treatment, visits to there may also be for good such as the birth of a child. While still requiring professional and medical help, it is a time of great joy.
I dreamt my daughter visited a hospital. She lives overseas thousands of miles away from us. The dream time was around 4am in the morning.
Please try to identify the feelings that trigger seeing a hospital in your dream, and of course talk with your daughter and see if she notices anything different on her end that may cause you concern.