very hard to make a diagnosis over the internet. if it is of real concern to you perhaps an appointment with the vet should be your first step. in the meantime maybe some bag balm rubbed on them may help.
To the OP- My dog had something similar, not crusted or split or anything. My vet told me it was a hot spot or a yeast infection and she gave me some PRESCRIBED medication to put on it, and to wash his testes with warm soapy water before application.