Hidradenitis Suppurativa Support Group
Hidradenitis suppurativa (hi-drad-uh-NIE-tis sup-yoo-ruh-TIE-vuh) is rare, long-term skin condition that features small, painful lumps under the skin. The disease manifests as clusters of chronic abscesses or boils, sometimes as large as baseballs, that are extremely painful to the touch and may persist for years with occasional to frequent periods of inflammation,...

Here's a list of HS doctors I've found. Dr. Kimball is who I saw - she is now at Beth Israel (I think she is listed at Mass Gen). Also, the doctor who is listed for NH is no longer practicing.
http://www.hs-foundation.org/treatment-sources/find/