ABSTRACT

Dry brushing — sweeping a stiff-bristled brush across dry skin — sets off a chain of biological responses. It removes dead surface cells and signals basal stem cells to divide; pressure opens PIEZO1 mechanosensory channels in keratinocytes; friction activates eNOS, producing nitric oxide and a temporary flush of vasodilation; rhythmic pressure nudges lymph through its two plexuses; mechanical loading stimulates collagen-producing fibroblasts; and slow strokes (1–10 cm/s) engage C-tactile nerve fibers linked to oxytocin and dopamine release. Evidence ranges from textbook-verified (PIEZO1, eNOS) to mechanistically plausible (lymphatics, microbiome recovery), which constrains sensible practice to slow strokes, moderate pressure, and 1–2 sessions per week. The interactive, fully cited cascade model loads below.