My wife and I are in our second 88 days and my wife is experiencing more detoxing. She is getting a lot of itchy bumps on her arms and leg. Is that common?

Yes, it can be. Some people can experience detox symptoms for many months. Another suggestion would be to reduce the daily amount of MSM to see if there is an improvement with that. Once your cells become hydrated too much MSM can cause an overactive immune response so reducing the consumption of MSM daily will help with that if that is the cause.