I can go on and on about the pros and cons about some of the hair products used to attach front lace wigs and some hair extensions. However, the main product that I find most harmful to the scalp is hair glue. It doesn't matter what brand of hair glue you try, after prolong use they all end up leaving you with bald spots and inflamed and irritated scalps.
The video below is by Désirée. In it described her recent hair loss after use a hair glue and how she is combating it.
I hope this video was helpful.