What are treatment options for dermatitis?

Not specific enough: "dermatitis" just means "inflammation of the skin". In other words, pretty much every rash is a "dermatitis". Without a more specific idea of what is going on, it is impossible to recommend treatment. Even if you are using "dermatitis" as a synonym for "eczema" (as some do), the possibilities are still too broad, since there are so many different kinds of eczema.

Protect: Avoid things that make you break out, soaps & wetness. Wash your hands only when necessary. Wear gloves when needed. Wear clothes made of cotton. Bathe only with a small amount of mild unscented soap, such as dove. Keep the water temperature cool or warm, not hot. Use the medicine your doctor gave you. Use a plain moisturizer daily. Avoid scratching or rubbing the itchy area. Manage stress.