9 days post op FUE, how can I know the different between graft falling or it's just hair? (photos)

Many patients are concerned after a hair restoration procedure that the grafts will become dislodged and fall out.  Shedding of the small hairs attached to the grafts is normal.  These usually appear as tiny hairs and can be covered with some crusts.  When a graft becomes dislodged,  there is usually associated bleeding.  If you are just seeing small hairs without any bleeding, there is no concern.  The debris in your photos appears to be part of the normal process.

In every patient, the graft shed (fall out) and then in 4-7 months they regrow. The shedding that happens spans 2-6 weeks usually, but they can happen even after that.  This is normal, so don't worry.