Shaving with hidradenitis suppurativa: what the evidence says

The razor did not cause this. But armpits and groins with HS deserve a gentler routine than the ads suggest.

Shaving with HS is a practical daily question that the internet answers with fear. The actual evidence is more reassuring than the forums: the only controlled study on the subject found no link between hair removal and developing HS. What's left is managing irritation on skin that's already inflamed, and that part has practical answers.

Observational evidence · low certainty

What the evidence says

The causal question was answered as well as it ever has been in 1982: a case-control study compared 40 people with HS against matched controls and found no significant difference in razor or depilatory use before the disease began. Shaving did not predict who developed HS. In a later retrospective series, 57.5% of patients shaved, and only three of forty considered it something that made their skin worse.

So the honest summary is: hair removal is not an established cause of HS, and for most patients in the data it wasn't even a perceived aggravator. What remains true is mechanical: a razor is a blade on skin, and skin with active lesions doesn't love blades.

Sources

The role of depilation and deodorants in hidradenitis suppurativa(1982, case-control study; 40 people with HS and matched controls)
Secondary prevention of hidradenitis suppurativa(2019, case series; 40 people with HS, retrospective)
Hidradenitis suppurativa: self-care (American Academy of Dermatology, patient page)(2024, guideline; AAD patient education page)

A gentler routine, in practice

The American Academy of Dermatology's advice for HS skin is prudential and sensible: a fresh, sharp blade; shaving in the direction the hair grows; a fragrance-free shaving medium rather than plain soap; and simply going around active lesions instead of over them. On flare days, many people skip the area entirely: stubble is temporary, an irritated lesion is a bad week.

Razor, wax or laser?

Waxing trades the blade for a pull: some people with HS tolerate it better, others find the traction on inflamed areas worse, and there is no comparative study to referee. Laser hair removal is the option with an actual clinical literature in HS care, which is exactly why it belongs in a dermatologist's office conversation rather than a beauty-salon booking: whether it fits depends on your stage, your skin and who performs it.

Whatever you choose, treat it like everything else on this site: one change, a defined window, notes. Your skin's answer outranks every forum thread, this page included.

The only test that counts

Evidence tells you where to look. Your body tells you what's true.

Everything on this page is a map of what's been studied, not a list of rules. The way I found my own triggers was an elimination and reintroduction protocol: one change at a time, a defined window, notes on everything. The full method, and the journal I used to track it, are in the book.

How I tested mine → the book The reintroduction method (free)

← All triggers

I am not a doctor: this page gathers published research and patient-reported information for informational purposes. It is not medical advice, and it is not a recommendation to start, stop or change any treatment, diet or product. Decisions about your health belong in a conversation with your doctor.