Hidradenitis suppurativa is classified into three stages using the Hurley staging system, which helps doctors understand how severe your condition is and determine the best treatment approach.
Stage 1 (Mild)
- One or a few isolated abscesses or lesions
- No scarring or tunnel formation under the skin
- About 55-70% of Show Full Answer
Hidradenitis suppurativa is classified into three stages using the Hurley staging system, which helps doctors understand how severe your condition is and determine the best treatment approach.
Stage 1 (Mild)
- One or a few isolated abscesses or lesions
- No scarring or tunnel formation under the skin
- About 55-70% of people with HS have this stage
Stage 2 (Moderate)
- Recurring lesions that disappear and reappear in the same or new locations
- Sinus tracts (tunnels under the skin) and scarring begin to develop
- Lesions may be widely separated or close together
- Around 28% of HS cases progress to this stage
Stage 3 (Severe)
- Multiple interconnected sinus tracts across large areas of the body
- Extensive scarring throughout affected areas
- Lesions frequently recur and may cover entire regions
- Only about 4-7% of people with HS reach this advanced stage
Most people with HS have stage 1, and early diagnosis and treatment can help prevent progression to more severe stages. Understanding which stage you're in helps guide your treatment plan and what to expect moving forward.
November 4, 2025
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