Hidradenitis suppurativa is also known as acne inversa. According to Mayo clinic, Hidradenitis suppurativa (HS) is a rare, relapsing, inflammatory skin condition that is characterized by small, painful lumps under the skin and are mostly found where skin folds such as the groin, the armpit, under the breast and between buttocks. The lumps may break open and smell or cause tunnels under the skin. It causes abscesses and scarring on the skin.
This inflammatory skin condition occurs in 1-4% world  population and it's often mistaken for acne, boils, or folliculitis (inflammation of the hair follicles). HS is not well-recognised even though its presentation is distinct and obvious from other skin condition. HS breakouts on both sides of the body and tends to return to specific locations such as armpit and groin.

The cause of this skin condition has not really been identified by Doctors. However, it is not caused my bacteria, it's not contagious, it's not caused by poor hygiene or any type of infection.

Factors that predispose you are obesity, female sex (three times more prevalent in women after puberty), history of HS in family, being a smoker, being between 20-29 years, and Crohn’s disease.

Proper treatment depends on an accurate diagnosis. According to Hurley's categorisation of HS, severity of HS is categorised into three and they are type I (mild and most common in patients), type II(moderate) and type III (Severe). Patients’ disease burden includes intense pain, work disability and overall poor quality of life. 

Treatment
It is a long term skin condition that has no known cure, however therapeutic approaches can be used to control it
1)Antibiotics such as tetracycline, doxycycline can be used to suppress. inflammation and to prevent infection
2) Acne skin wash,
3) Zinc supplement
4) Pain killers
5) Corticosteroid are given for severe case of HS

Home remedies for HS
1)Warm compress
2) Honey and, Tumeric can be used cause it contains antibacterial, and antiinflammatory properties. These can help control inflammation and prevent infections.
3) Apply Tea tree oil topically.
4) Take Zinc supplements.
5) Aloe Vera gel.
6) Neem oil has long been used to treat skin conditions like acne. It can help reduce bacteria, redness, and inflammation. It also contains a high fatty-acid content, which may aid in healing scars.
7) Apple cider vinegar prevents bacteria infections.
Bleach bath (dilute bleach in water).
9) Eat antiinflammatory foods: it may reduce flare-ups of hidradenitis suppurativa and possibly help current symptoms to resolve faster. e.g tumeric, ginger, oily fish, and green tea.
10) Eat balanced diet.
11) Reduce sugar intake.
12) Eliminate diary food.
Prevention tips:
1) wear loose clothes
2) lose weight
3) maintain proper personal hygiene
4) shave armpit and pubic area
5) maintain a healthy weight
6) Stop smoking (if you are a smoker).