Definition
An abrasion is the removal of the superficial epithelial layer of the skin, usually the epidermis and papillary dermis, by friction against a rough surface.
Why abrasions matter medicolegally
- Medicolegally, abrasions are more useful than bruises.
- Give an idea about the site and direction of force.
- Direct impact is the most common mechanism.
Ageing of an abrasion
| Age | Appearance |
|---|---|
| Fresh | Bright red |
| 12–24 hours | Lymph and blood dry to form a soft red scab |
| 1–2 days | Scab becomes reddish-brown |
| 3–5 days | Scab becomes dark brown and shrinks |
| 5–7 days | Epithelium grows beneath the scab |
| 7–10 days | Scab dries, separates and falls off |
| After healing | Depigmented area may remain temporarily; usually no permanent scar |