Post-regenerative amnesia

Post-regenerative amnesia was the loss of memory which was a common-side effect of Amnesia traumatic regenerations. Symptoms ranged from uncertainty about names, (TV: Castrovalva, Time and the Rani, Deep Breath) including their own, (TV: The Woman Who Fell to Earth) forgetting a skill they had mastered, (TV: The Time of the Doctor) or complete memory loss. (TV: Doctor Who)