ACL Tear Symptoms: Signs, Treatment And When Surgery Is Needed A knee injury can happen unexpectedly during sports, exercise, or everyday activities. You hear a "pop." Your knee swells and feels weak. It is easy to overlook these symptoms and expect the knee to recover naturally. But these could https://app.notion.com/p/ACL-Tear-Symptoms-When-Do-You-Need-Surgery-40af0ffaeda780df9581ce8be7f83a8a?source=copy_link