aside from real medical cases such as skin cancer (and even then, melanoma patients and such are referred to oncologists anyways), irregular moles, severe acne and such, vanity plays a big role in dermatology being such a lucrative job. Unlike plastic surgery, arguably another speciality that makes its money off of patients' vanity (disclaimer: im not saying all of plastic surgeons fit into this vanity category: reconstructive plastic surgery is much different then tummy tuck surgery and things of that nature) patients dont have to worry about any major surgeries, things are done pretty much in the office, there are rarely any malpractice lawsuits, and they have hours that are unlike any other speciality of the same income. The lifestyle is very much desired because so many more hours can be dedicated to family and such- whereas anotehr type of doctor might be in the hospital for 12-16 hours a day.