Feeling knots or tenderness in your feet can be caused by various factors, including overuse injuries, biomechanical issues, and aging. The human foot contains complex anatomy, with 33 bones, ligaments, tendons, and muscles working together to facilitate movement and support body weight. Understanding the causes of knee-like deformities in the feet, such as plantar fasciitis and Achilles tendon issues, can help alleviate discomfort. Remedies include exercises and stretches, strengthening lower limbs, and proper footwear selection.