I went vegan 10 years ago to help recovery times after all night raving in my 40s. I'd had six surgeries for HS before that, I've had none since, and no abscesses since. Apart from 2 weeks ago when I accidentally ate 4 veggie burgers made with dairy ingredients and the HS effects kicked in again - thankfully gone now.
And once you look into how cruel and unhealthy the dairy industry is (milk can contain millions of pus cells per litre) you'll feel a lot better