>>87250173nta, but both statements are correct
scar tissue are a result of destroyed cells being replaced with unspecialized, mainly connective tissue type ones to retain body integrity
it' not great whenever it is formed, because the cells of this type can not fully replicate the form or function of what was lost, but it also means that whatever damage was happening had finished healing
the problems start when there's too much of it for the organ to properly fulfil its function (as it cannot really be replaced by healthy cells even if the organ is capable of regeneration), which is why stuff like liver scarring is a big deal
