Scars are composed of new connective tissue that replaced lost substance in the dermis or deeper parts as a result of injury or disease, as part of the normal reparative process.

• 疤痕是新形成的结缔组织，取代了由于外伤或疾病引起的真皮或较深部位所缺失的物质，是正常修复过程的一部分。