While the vehicle was parked outdoors and the powered rear trunk lid was fully open, I leaned/bent forward into the trunk to retrieve an item. The edge of the trunk lid near the taillight assembly made contact with my scalp, causing a laceration. The wound bled significantly。The trunk lid’s fully-open position, combined with the geometry/edge of the liftgate near the taillight, creates a head-strike hazard for an average-height adult bending into the cargo area. I am requesting that NHTSA investigate whether the powered trunk lid’s open-position geometry presents an unreasonable risk of head injury to vehicle occupants/owners during normal use.