You go from a patient with severe psoriasis to one with mild psoriasis, to a patient with a skin tumor, to a patient with a strictly cosmetic problem of too many wrinkles. It's not the same thing over and over again. I think dermatologists are among the happiest of all specialists. You can clear any patient with psoriasis, but the most challenging thing is to keep them clear. The same is true for patients with eczema.
Skin cancers are usually easy.
You remove the cancer and you're done with it. There are different modalities for treating skin cancer, but when you're done, you're done, for the most part. But with psoriasis or eczema, you have to keep after it, and you have to do it so that you disturb the patient's life as little as possible, or else they are not going to follow it. The trick is that no one should change their lifestyle over skin disease. They should be able to keep doing what they are doing without the treatment or the disease getting in their way.