How scars become hypertrophic
After closure, collagen is deposited and then remodelled over roughly a year. Where deposition outpaces remodelling, the scar becomes raised, firm and often itchy or painful — hypertrophic, or keloid where growth extends beyond the original wound margins.
Two modifiable factors influence that balance: hydration of the outer skin layer, which moderates fibroblast signalling, and mechanical tension across the wound, which stimulates further collagen production.
What silicone does
Silicone gel and sheeting occlude the scar surface and maintain hydration of the stratum corneum. The effect appears to be mediated by that hydration and occlusion rather than by any pharmacological action, and it is recommended in international scar-management guidance as a first-line non-invasive option for both prevention and treatment.
Gels suit mobile areas, the face and irregular contours; tapes and sheets suit flat sites and can add gentle tension control.
Protocol and adherence
Therapy generally starts once the wound is fully closed and dry, and continues for at least two to three months — longer for scars that remain red, raised or symptomatic. Daily wear time matters more than product choice.
Because outcomes hinge on months of consistent use, comfort, skin tolerance and simplicity of application are the practical determinants of success.
This article is general educational information for healthcare professionals and is not clinical advice or a treatment recommendation. Always refer to the current instructions for use and local clinical guidance.