House M.D. Season 3 Episode 14

When teenager Hannah Morganthal brings in her wounded mother Abby after a car accident, House spots that she must be afflicted by an extremely rare condition. She cannot feel pain and this is a constant problem as she could be injured without noticing. He has a hard time getting her committed, but she soon gets acute medical problems. In order to diagnose the cause, Chase comes up with a House-like method: expose her to such extreme pain even she may feel it. Meanwhile Valentine's Day dating lays bare team members' relational problems.