In terms of shedding location, where does the thinning often feel more drastic to patients because it involves pre-existing hair?
The surrounding area consisting of existing, non-transplanted native hair
While the transplanted grafts will shed their existing shafts, the more emotionally impactful shedding for many recipients occurs in the native hair surrounding the recipient zone. This native hair is shocked into the telogen phase due to the minor inflammatory response and physical manipulation occurring nearby during the procedure. Since this native hair represents the area the patient was trying to preserve or enhance, seeing it temporarily thin out can be perceived as more severe than the expected shedding of the newly implanted graft shafts. This temporary thinning of native hair is a direct consequence of the localized surgical event.

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Shock Loss After a Hair Transplant?