Ligament injuries may exhibit different symptoms depending on whether they are acute or chronic. Acute ligament injuries generally occur within one to three days after the injury. At this time, the main symptoms are caused by blood drawn from the injured ligament, leading to swelling, bruising, pain, and corresponding joint movement disorders at the injured site. Severe ligament injuries can even cause avulsion fractures. Chronic ligament injuries usually result from acute injuries that have not been properly treated. At this point, the main issues are joint instability and pain in the joint caused by long-term damage to the cartilage.