Knee pain is one of the most frequent musculoskeletal complaints, affecting people of all ages — from runners and gym-goers to those who spend long hours standing or have reduced lower-body strength. The knee relies on good mobility in the hips and ankles, strong surrounding muscles, and balanced movement patterns. When any of these areas become tight, weak, or overloaded, issues such as patellofemoral pain, tendon irritation, ligament strain, or general wear-and-tear can develop. Symptoms often include aching around the kneecap, stiffness after sitting, pain going up or down stairs, or discomfort during sport.