21/08/2026
OMG I forgot to tell you the answer 🙈… tropical steroid withdrawal syndrome (TSW). The red sleeve sign — diffuse confluent erythema on the forearm with spared palms is one of the characteristic presentations of topical corticosteroid withdrawal after prolonged potent steroid use.
TSW is a rebound effect following discontinuation of prolonged use of mid to high potency topical corticosteroids, characterised by red burning, itchy, painful skin lesions, often accompanied by peeling and cracking. There are currently no definitive diagnostic criteria, and it is frequently misdiagnosed as a flare of the underlying condition.
The mechanism involves several converging pathways. Keratinocytes have continued suppression of self-cortisol production after topical steroid cessation. Topical corticosteroids cause vasoconstriction, and on withdrawal rebound vasodilation occurs from increased nitric oxide release, leading to the characteristic skin erythema. Barrier disruption then induces a rebound cytokine cascade once the anti-inflammatory effects are withdrawn.
This is why abrupt cessation after prolonged use is problematic. And why a controlled taper, rather than stopping suddenly, is the clinical standard.
The differential from an eczema flare can be genuinely difficult. TSW tends to produce burning rather than itch as the dominant sensation, extends beyond the original treatment sites, and the palms and soles are characteristically spared.
If you are supporting a patient through TSW, the work is largely barrier restoration, microbiome support, symptomatic relief, and time. There is no quick fix. But understanding what is happening mechanistically helps both the practitioner and the patient stay the course.
I won’t see you next Wednesday, but stay tuned!
Rebecca Hughes
