I want to suggest that we should always include treatment (drugs) to our DD.
Thank you for your understanding.
I usually do and when you use my soaking formulas many enigmatic eruptions respond. Persistent eruptions I will then render a diagnosis. Invariably koh and wet mount will be suggested and every dermatologist must learn how to do them. Just treating empirically for scabies and tinea often fail as we can see by all the presentations.