I have pilonidal disease but have recently also been diagnosed with hidradenitis suppurativa. For people who don’t know what this is, it is when you develop abscesses in areas such as underarm, groin and mammaries. I would be interested to hear from anyone who has both these conditions as they seem few and far between. Reading up on the subject, there is something called the acne tetrad which also now includes pilonida sinus. There is a link between HS and PD. I think more research needs to be done on this subject. In the meantime, I have to deal with not one but two conditions. Help!