Introduction: The nail bed is a fundamental structure of the nail unit. Given its close relationship with the nail plate, the distal matrix, and the hyponychium, how it interacts with these structures is still a matter of study. Case Presentation: We describe clinical cases of patients with traumatic destruction of the nail bed treated with mechanical dermabrasion in a reference center. Both clinical cases had a satisfactory response to the treatment, which supports the proposed theories about the functioning of the nail bed. Conclusions: The nail bed is a dynamic tissue that closely interacts with adjacent structures and responds to forces applied to it.