These white stretchy plugs we dig out of our sores is part of a skin condition called prurigo nodularis. This is something that we have made by causing trauma to our skin. I have not been able to find a cure yet for them, but my best advice is not to pick them and while reading about the condition our immune system seems to have an affect on this. So make sure you take care of yourself and are healthy! Please research this, I have been trying to find this for 7 years.