I have big boil-like bumps on my groin, armpit, and butt area, which turns into an open sore. Why?

Hi doctor,

I got a big, almost boil-like bumps on my groin, armpit, and butt area, but mostly in the groin that burst and drain and then turn into open sores. I forgot to mention that they leave spaces or like craters almost underneath my skin. When they finally heal, I have been tested for STDs, culture, and herpes test too many times. I have done a culture test, which rules out staphylococcus infection, etc. No doctor could tell me what was wrong. A doctor said to me that I had hidradenitis suppurativa, but I was never officially diagnosed. The bumps keep getting worse in frequency and pain level. I have prescribed an anti-inflammatory that did not help, and it is becoming an interruption in my life. When they pop up, it makes me hard to wash, walk, and get dressed. I am so tired of this, and I need to know the reasons for this.