What is the problem a school child can face if the strap of the bags are narrow?

If a school child's bag straps are narrow, they may experience discomfort and pain in their shoulders and back, especially when carrying heavy books and supplies. This can lead to poor posture and potential long-term musculoskeletal issues. Additionally, narrow straps can dig into the child's skin, causing irritation or bruising, which may discourage them from carrying their bag properly. Overall, inadequate strap width can negatively impact the child's comfort and health.