The procedure involved with tongue tie is a very contravertial one. My youngest has tongue tie and although she was falling of the breast when feeding the docs said it still wasn't a problem. When they are babies, the procedure is to lift the tonge up and just snip the tongue tie (there are no nerves in there so it shouldn't hurt). Quite a few babies have slept through this. As they get older, should it prove a problem with speech, they would need to either have speech therapy or if it needs to be cut they would need a GA to have it done.
I do exercises with my l/o - i.e. poking my tongue out at her for her to copy, blowing raspberries at her - anything to get her to try and stretch the skin. I'm still not happy so i'm going private to have a consultation.
If you want to have a chat feel free to pm me