To Lye or Not To Lye

I understand using lye hair relaxers as better on the hair. But from my understanding they burn the scalp. I have extremely sensitive scalp. I can barely take a non-lye hair relaxer. When I relax my hair I have to start from the front and proceed to the back to ensure that the front is at least finished. I know SMH. So there is no way I would even consider trying a lye relaxer. It is said that no lye relaxers cause calcium build up The calcium build up causes it to block the hair, so that moisture can no penetrate it. I have not experience that. So for now I am not a lyer.