Hair Transplant: Why cotton pillowcases sabotage your graft survival rate
Protect my grafts →A hair transplant — whether FUE or FUT — involves extracting individual follicular units and reimplanting them in the recipient zone. During the first 10 days post-operation, grafts are not yet vascularized: they survive through direct plasma imbibition from the scalp. The slightest mechanical disturbance can dislodge them irreversibly. Sleeping on cotton during this critical window is a clinical error that no surgeon will explicitly describe to you — but one that directly impacts your final density.
The Abrasion Mechanism on Non-Vascularized Grafts
Cotton fibers, under electron microscopy, present a surface similar to velcro at the micrometric scale. When the head moves during sleep, this surface grips the fragile crusts that form around each graft. A single night of friction can dislodge 30 to 80 grafts. At an average cost of €3 to €5 per follicular unit in a clinic, that represents a loss of €150 to €400 in a single night — without counting the aesthetic impact of bald patches in the transplanted zone.
Temperature Regulation and Edema Reduction
The scalp post-transplant is inflamed and produces significant heat. Cotton traps this heat, maintaining chronic vasodilation that slows the process of re-vascularization. Silk, as a natural thermoregulator, actively dissipates this heat, promoting optimal vasoconstriction conditions and accelerating the establishment of new capillary networks around the grafts.
