Glue hair extensions can damage your hair and scalp. Clip in extensions are better and safer. Clip-in hair extensions are a great alternative to sewn-in or glued in hair extensions and require very little maintenance. 

If your hair or scalp was damaged by using glue. 

Please consider looking at the Scalp Spot Cream / Bald Spot Treatment. 

Here is a link to it- 

The nutritive vinegar rinse should also be considered to help improve the overall health of your scalp.