
The truth of the matter is that not all bogeys are green. They can range all the way from clear down to filthy grey/black. So why the variety?
First we must identify the standard types of snot, and their common causes.

The truth of the matter is that not all bogeys are green. They can range all the way from clear down to filthy grey/black. So why the variety?
First we must identify the standard types of snot, and their common causes.