Hi, Intza. In my opinion, two problems can be combined in this cave or cauliflower head: temperature ups and downs and disease. The fact that these holes and red remains appear at the top of the head indicates that it can be a frost. Collect the drops of water, then freeze the cold drops and burn the thin crust. From burns it is easy to inject the disease, especially if it is a hot environment, such as this year. So eat and enjoy as quickly as possible. Hold the garden!