Symptoms of Runner’s Knee: Runner’s knee, medically known as patellofemoral pain syndrome (PFPS), presents with symptoms such as pain behind or around the kneecap, especially when bending the knee, kneeling, or climbing stairs. Some individuals may also experience a grinding or popping sensation. Causes of Runner’s Knee: 1. Overuse or Overtraining: Excessive running or sudden increases in training intensity can strain the knee joint. 2. Muscle Imbalances: Weakness or imbalance in thigh muscles,