Your daughter is suffering from acute suppurative otitis media
. The discharge from the ear is on account of that. I will suggest you to visit an ENT Specialist
and get her examined. The white crusts that you can see is the purulent discharge coming out. You need not worry. Your daughter needs some antibiotics and ear drops. It may be due to weather change. She will be fine.
Till she is under treatment and not fit, restrict her from swimming, it may affect her ears. Neglect may cause the problem to get chronic. It is good to know that she is not having pain or fever
. Have a good day. Take care.