Knee joint instability
If you observe that your knee starts to feel like it will break or seems wobbling, then you definitely need to go to a doctor. The instability of the knee joint might become worse if you use your knee as usual as it indicate a severe ligament problem.
Deformity of the knee joint
If you notice your knees are sticking out in a way like never before then there is an obvious deformity of the knee joint. A fractured or dislocated kneecap or patella might cause such deformity of the knee joint and requires medical assistance from a professional. Some deformities might happen over time while the deformity resulting from an injury indicates a chronic wear or fracture of the knee joint. If a person is having any type of misalignments in their lower extremities, then they could be more likely to go through deformity of the knee joint. The doctors recommend seeking medical assistance from an orthopedic doctor if you are noticing a joint deformity especially after an injury.