Sjogren's Syndrome Support Group
Sjogren's syndrome is an autoimmune disorder in which immune cells attack and destroy the exocrine glands that produce tears and saliva. It also associated with rheumatic disorders such as rheumatoid arthritis, and it is rheumatoid factor positive in 90 percent of cases.
Here is some info on it and they do use the term boils so I think it is one in the same. Hope this helps you a little.
http://www.skincell.org/hidradenitis_suppurativa.shtml