system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do razors/sharp blades cause scars but regular cuts heal without such obvious damage?
gpt
Razors cut such a clean edge on the skin, theres nothing for the red blood cells and platelets to grab onto to start forming a clot

Regulate cuts leave jagged edges in the skin, even if you can’t see them, for the red blood cells and platelets to attach to.