The Chicken Pox rash in adults will usually go away within 7 days on it's own and there's not much you can do for Chicken Pox other than wait it out.
Although Chicken Pox is rarely a severe illness people have died from it so it's best to get a vaccine for the Chicken Pox especially if you're an adult.
The Symptoms of Chicken Pox usually come on 21 days after you're exposed to the Virus and once you have the Chicken Pox it should be gone within 7 days.