An damage to the collateral ligament also causes the knee to pop and buckle. It also brings about discomfort and swelling. Generally you will have pain at the edges with the knee and swelling more than the injury website. Ankle ligaments ordinarily just take ten to 12 months to mend https://community.wongcw.com/blogs/737401/Understanding-and-Overcoming-Knee-Ligament-Injuries-A-Comprehensive-Guide