well it is scary a little. I had mine so long I was clearing my own lines. I learned I couldnt breath in when changing the cap because it would cause an embolism. I think there they obviously take care of it and probably never need to change caps.
Sometimes it would itch where the line goes in, but thats because I had mine so long the skin was healing around it. It's not as bad as it looks though. They give you an amesiac medication when they put it in, You just dont rememebr much. To take it out you are awake and they just pull and it's over. No pain at all.