how long does arthritis last??

For the rest of a person's life.

http://www.google.com/search?q=arthritis&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA

There is never a need to post a question seven times in four minutes. Please refrain from doing such things in the future.

Thanks.