A dermatologist can normally tell at a glance whether or not your itching rash is of a fungal nature. There are many different types of wart viruses, and just as many ways to treat them. It is important to have warts treated to help stem the spread of infection. Warts are extremely infectious. Again, a dermatologist is best equipped of any medical specialty to treat warts.
Many dermatologists are excellent at scar revision and repair, as well.
There are other conditions and diseases treated by dermatologists, some common, some a little more obscure. The list is extremely long, since it includes anything having to do with the skin, hair and nails. So do yourself a favor, and become established with a specialist that can treat that largest of human body organs as problems arise. Choose one . . .