Firstly, properly installed hair extension should not have any long term discomfort for the client.
In my opinion a properly trained hair extension technician would be concerned about the comfort of the client, the overall look and presentation of the finished hair extensions, client satisfaction, confident in their overall professionalism, not shying away from dealing with any client discomfort, professionally resolve any problems. ...More >
A full head of hair extensions would usually mean that the extensions have been installed at least 1 centimetre away from the front hairline. A half head of hair extensions start from ear to ear and are installed at the back of the clients head.
System of application are: individually, tracks, partial or whole head systems.
Usually when a weave is done, the correct procedure is to apply several tracks to the bottom row near the back of the neck, so as to build up volume. The middle row a couple of tracks and the top row only one track. This ensures that there is no discomfort at the top of the head.
I suggest you ask your hair extension consultant to remove the tracks and place them the other way round; she should be willing to do this at no extra cost because she would have already prepared the cornrow tracks.