If you have a torn meniscus in your knee does it tear more if you walk on it?

Depends on… Location of tear & degree of tear & types of activities u r involved in. Actions that involve rapid change of direction on weight-bearing knee can exacerbate injury. Simple walking shouldn't cause problems unless a piece of cartilage tears free (joint mouse) & catches, causing decreased range of motion. Follow up with orthopedic/sports medicine specialist.
Yes. The tear in the meniscus can extend if not repaired. Consult an orthopedic specialist.