They will be able to tell that they are old. You might get a question about them but if they are really old then they won't say anything.
But more than likely they wont say a word
Well if you were doin it while prego u might could be charged with child endangerment... but if it was befor u wouldnt be.... they may not even say anything. I know scars take a long time to go away... i use to self harm n stoped a long time ago but i still have scars on my arms. You can tell they are old and maybe you wouldnt notice cause of them being so faded but i clearly see them and am always upset about what i did cause it was so stupid :/
They won't say anything don't worry.