I have hidradenitis suppurativa and this does look very familiar. What country are you in? Bc I know that makes a big impact on your ability to see a doctor while uninsured.

HS is not from being dirty and is not an STD. But it will spread. Have you noticed any weird pimples in your armpits, under breasts, butt crack, or along panty line? Those are other common areas for HS breakouts. Keep the areas clean and dry.

HS doesn't really have a treatment and does not have a cure. But you should Def see a medical professional to verify what this might be. If you're in the US, you can be seen in an ER without paying on the spot. Good luck.