# Why is Acne Inversa (Hidradenitis Suppurativa) often diagnosed late?

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Language: en
Category: Diagnosis
Published: 2026-05-21
Last updated: 2026-05-21
Last editorially reviewed: 2026-05-21
Next scheduled review: 2027-05-21

Author: Dr. rer. nat. Dennis Alexander Kwiatkowski (Biochemist, Scientific Writer and Pharma Expert)
Scientific editor: Dr. rer. nat. Dennis Alexander Kwiatkowski
Reviewer qualifications: Biochemist, Scientific Writer and Pharma Expert
Review scope: Scientific literature, clinical guidelines, sources, and editorial clarity
Clinical reviewer: No independent clinical review
Tags: Acne Inversa, Hidradenitis Suppurativa, HS, Diagnosis, acne inversa, diagnostic delay, early symptoms, doctor's appointment

> Acne inversa is often only recognised after recurring symptoms. This article explains why early HS can be overlooked and what helps during the doctor's appointment.

Medical disclaimer: This website is for general educational information only and does not replace medical advice, diagnosis, or treatment. Please speak with qualified medical professionals about symptoms or treatment decisions.

## Article

## The delay has reasons

Many people affected by acne inversa do not experience it as a clear, immediately recognisable
story. At first there may be a painful nodule, later an abscess, then a quiet phase. A German
study on diagnostic delay reported an average period of about ten years between the first
symptoms and the diagnosis.

This is not about blame. It shows how easily HS can be read as a series of
separate skin problems in its early course.

## Early HS often doesn't look clear-cut

A deep, inflamed nodule can initially resemble a boil, folliculitis,
an inflamed cyst, or an ingrown hair. If only the current spot is visible at
the appointment, the recurring overall pattern remains easier to miss.

## Flare-ups fit poorly into appointments

HS can fluctuate. A spot may have healed by the scheduled appointment, even
though it was very painful or oozing shortly before. Without information on
the course, the affected body areas, and previous episodes, the condition can
seem smaller than it actually is in everyday life.

## Intimate body areas make it harder to talk about

The armpits, groin, genital and perianal region, buttocks, or skin folds under
the breast are not always easy to show or describe. Shame, worries about odour,
and poor previous experiences can lead people to shorten their description of
symptoms or postpone appointments.

## There is no single test that proves the diagnosis

The diagnosis is made clinically. Medical professionals assess the lesions,
their locations, and the course over time. Blood tests, swabs, or other
examinations can help, depending on the situation, to assess complications or
rule out other causes. However, they do not replace looking at the overall
pattern.

## Acute care can obscure the pattern

A painful abscess needs attention. If every episode is treated only as an
isolated acute event, questions about recurrence, scarring, and typical body
regions can get too little attention.

## What makes the diagnosis easier to recognise sooner

Bring as much concrete information as possible to the appointment:

- affected body areas,
- approximate frequency of episodes,
- photos of active spots, if available,
- scarring, discharge, or recurring openings,
- previous diagnoses and treatments.

This turns "recurring inflammation" into a traceable medical history.

## References

1. Delayed diagnosis of hidradenitis suppurativa and its effect on patients and healthcare system - Dermatology, 2020 - https://pubmed.ncbi.nlm.nih.gov/32610312/
2. S2k-Leitlinie zur Therapie der Hidradenitis suppurativa / Acne inversa - AWMF, 2024 - https://register.awmf.org/assets/guidelines/013-012l_S2k_Therapie-Hidradenitis-suppurativa-Acne-inversa_2024-08.pdf
3. North American clinical management guidelines for hidradenitis suppurativa, Part I - Journal of the American Academy of Dermatology, 2019 - https://pubmed.ncbi.nlm.nih.gov/30872156/