Will hypertrophic scars become larger if frequently touched with hands?

Nov 28, 2025 Source: Cainiu Health

Dr. Liu Wenmin

Introduction

During the scar hypertrophy phase, the local tissue is still in an active repair period. Frequent touching with hands continuously stimulates fibroblasts at the scar site, promoting excessive secretion of collagen fibers, which leads to further thickening and elevation of the scar tissue. Originally stable hypertrophic scars may gradually enlarge, and symptoms such as redness and itching may worsen, thereby prolonging the recovery period.

Generally, frequently touching a hypertrophic scar with hands may cause it to enlarge, as manual stimulation can aggravate the local reaction; the risk is even higher if infection occurs. If there are any concerns, it is advisable to seek medical advice promptly. The detailed explanation is as follows:

During the phase of scar hypertrophy, the local tissue remains in an active repair state. Frequent touching stimulates fibroblasts at the scar site continuously, promoting excessive secretion of collagen fibers, which leads to further thickening and elevation of the scar tissue. Previously stable scar growth may gradually increase in size, while symptoms such as redness and itching may also worsen, prolonging the recovery period.

If hands are not properly cleaned, repeatedly touching the hypertrophic scar area may introduce bacteria, potentially causing infection characterized by redness, swelling, and exudation. Infection further irritates the scar tissue, disrupting the normal healing process. This not only may lead to enlargement of the scar but could also result in harder texture and darker pigmentation, increasing the difficulty of subsequent treatment.

In daily life, avoid frequently touching areas with hypertrophic scars and maintain local cleanliness and dryness. If significant itching occurs, mild anti-itch products may be used under medical guidance. If the scar continues to grow or signs of infection appear, prompt medical attention is necessary.

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