Summary: No one has the time to care about their appearance anymore.
As a medical student, Martha used to keep her fingernails nice, clean and short. Now, sitting by a bonfire, surrounded by ragged, hopeless people, she stares at her hands and sees how ragged and dirty they’ve become, chipped and broken from scrambling over rubble.
Everyone’s hands are the same; manicures are a thing of the past, belonging to the time before, when looking good wasn’t a luxury nobody could afford. Now, everyone’s too busy trying to find enough food and stay alive for one more day.
But that’s why she’s travelling, to restore people’s hope. The Doctor will fix this.