ACL Tear Symptoms: When Do You Need Surgery? You Twist your knee while playing football, running, or even stepping off a curb. You hear a "pop." Your knee swells and feels weak. Many people ignore this and hope it will heal on its own. But these could be ACL https://healthharborblogger.blogspot.com/2026/10/acl-tear-symptoms-when-do-you-need.html