Safety · 2026-07-12
Journal of Cutaneous Pathology Editorial: Kratom-Induced Skin Hyperpigmentation Is Now an Established Clinical Entity Clinicians Must Know
Source: Journal of Cutaneous Pathology
Why it matters
Kratom-induced hyperpigmentation is now appearing frequently enough in dermatology clinics that four academic dermatologists have issued a formal editorial urging all dermatopathologists and dermatologists to recognize the condition. Misidentification delays correct diagnosis and management.
The big picture
Several case reports over the past three years have documented a distinctive gray-blue photodistributed hyperpigmentation in chronic kratom users, typically affecting sun-exposed skin. As kratom use has grown — with estimates ranging from 1.7 to 15 million U.S. users — this skin condition has emerged as one of the clearest visible clinical signs of chronic use. The mechanism appears to involve melanin deposition in the dermis, with some parallels to other drug-induced pigmentary disorders.
Key findings
- Authors from four major academic centers (University of Illinois Chicago, UC Davis, Cleveland Clinic, and NYU) co-authored the editorial
- The condition presents as diffuse gray-blue hyperpigmentation, most pronounced in sun-exposed areas
- Skin biopsies show basal layer hyperpigmentation and dermal melanophages — a distinctive histopathologic pattern
- Multiple prior case reports and at least four published case series now document this dermatosis
- Treatment with 730 nm picosecond titanium sapphire laser has shown success in reversing pigmentation
What they say
Authors note that "kratom-associated drug hyperpigmentation should be considered as a diagnosis when evaluating patients for other drug-associated pigmentary disorders," emphasizing that clinicians unfamiliar with kratom use will miss the diagnosis without explicit awareness.
Bottom line
Kratom-induced gray-blue hyperpigmentation is now a recognized clinical entity with a distinctive biopsy pattern — dermatologists and pathologists need to add kratom use history to their differential when evaluating drug-induced pigmentation.