In House M.D., House uses a cane as the famous aid for his damaged right leg.
House's limp and cane result from an infarction in the quadriceps muscle of his right thigh. The injury caused permanent muscle damage and chronic pain, helping explain both his distinctive gait and his dependence on pain medication. The show's backstory reveals that the condition was initially treated after a delayed diagnosis.
The cane becomes an instantly recognizable visual feature of the character. It is also a practical storytelling device, emphasizing his physical limitations while contrasting them with his exceptional mental abilities. House sometimes modifies or decorates canes, making them part of his individual style.
The cane is not the medical cause of House's disability; it is an aid used to manage its effects. Viewers may also remember his Vicodin use, but medication and cane answer different parts of the character's medical history.