I haven't had too serious of cases of HS and it definitely self diagnosed but I am 99% sure I have it. I have suffered with it for about 3 years and what I have been using over the last 6 months is CBD topical oil. It is 125mg so it is extra strength. It has helped soothe the skin and I haven't had any cysts occur since using it. Even when looked and felt like it was going to appear, I applied it liberally and religiously to the area and it stopped the growth until it receded.
Otherwise, having a script of doxycycline is always a good backup if a serious case begins but I hate to disrupt my gut biome more than I already have.
CDB oil can be expensive but I would just try it out because it can hopefully make a huge difference for you. I know how difficult and painful this can feel and I hope this information helps you.