Heavy scar is either a keloid or a hypertrophic scar, The distinction is important because there is no good treatment for keloid scars but hypertrophic scars are often be improved with scar revision.

• 厚疤可以是蟹足肿或肥厚性疤痕；两者的分别是很重要的；因为对于蟹足肿并无有效的治疗方式；但肥厚性疤痕通常可以经由疤痕修正改善.