How to know if i tore a ligament in my ankle?

See your doctor.: Torn ankle ligaments are associated with severe pain, bruising, swelling, and difficulty walking. A torn ligament can often be diagnosed by a clinical exam that manipulates the ankle in certain directions. X-rays, mris, and ultrasounds can confirm the injury. Sprains and tears are treated differently. If not properly treated, a torn ligament can result in chronic pain and ankle instability.