Flat feet occur when the arches of the feet are lower than normal or completely collapsed, which can impact the alignment of the feet and legs and place extra strain on muscles, ligaments, and joints throughout the lower body. This condition may be present from childhood or develop over time due to injury, arthritis, or tendon dysfunction. While some people experience no symptoms, others notice pain, fatigue, or difficulty standing or walking for long periods. Assessing the severity and underlying cause is essential for selecting the most effective treatment and preventing long-term complications.