Human body once you hit 30: Hey, remember that time your knee was sore for an hour when you were 12? Well now it's gonna be sore for the rest of your life
Does anyone else just want those bacta tanks that they had Luke floating in after his hand was cut off or is that just me?
I bet you could do some serious shit to a person if you had something like that. Just crawl back into this cyber womb and we'll get you fixed up in a week.
In Star wars that's because the journey that Luke Skywalker was going though was running in parallels with the first Irish King Nuada of the Tuatha de Danan, (in Welsh known as Llud) who lost his hand and his kingship due to the Irish requirement that Kings be physically flawless only to regain it with a hand made of silver that was magically attached to him.
If the bacta tank had healed Luke's hand then he wouldn't have gotten the cool robot hand which gave him a point of familiarity with his own cyborg father in their final confrontation.
It's highly innervated (sensitive) and it's cartilaginous. Cartilage is mostly nonvascular, meaning that it doesn't have blood flow to it, and which also means healing takes forever.
Because it tends to hurt for a while due to the actual physical trauma, our nervous systems also tend to send the pain messaging well after the actual trauma, even if healing has taken place. This specific pain presentation is a form of chronic pain (mostly a nervous system disorder) that is usually onset by some sort of physical trauma.