1726-nm Laser for Acne Inversa (Hidradenitis Suppurativa)

Inclusion Criteria: * Adults 18-60 years; any sex; Fitzpatrick I-VI. * Clinical HS, Hurley I-II (Investigator confirmed). * At least one inflammatory nodule in a paired, bilateral region (axilla, groin/inguinal, inframammary, inner thigh, or buttock) within 4 weeks prior to baseline. * Able to read/speak English/Chinese/Spanish/Vietnamese and sign consent. * Willing/able to comply with visits, pre/post-care, standardized photography. * Agree to avoid new HS procedures/therapies in study areas through Week 24. * No laser contraindication; agrees to shave/clip hair before treatments. * Optional translational cohort: willing to undergo 4-mm punch biopsy at baseline and Week 16 from the randomized regions (separate consent). Exclusion Criteria: * Hurley III (extensive sinus tracts). * No qualifying nodule(s) in paired bilateral regions in past 4 weeks. * Prior device/procedure to target areas within 3 months (chemical peel, dermabrasion, microneedling/RF, other lasers/LBB, cryo/chemo-destruction) * Had Botulinum toxin in target areas within 3 months or planned during study. * Had systemic retinoid (e.g., isotretinoin) within 3 months. * Photosensitizing meds that, in PI's judgment, materially increase risk and cannot be held. * Pregnancy/breastfeeding/plans to conceive during study. * Active infection, still healing wounds (investigator judgment) in target areas. * History of keloids/hypertrophic scars, radiation to target areas, malignancy in target areas, diagnosed immunodeficiency, uncontrolled coagulation disorder or therapeutic anticoagulation that cannot be safely managed. * Excessive tanning or inability to avoid tanning. * Any condition (medical/mental) or prisoner status that in PI's opinion compromises safety or adherence.