What should you know about swollen left ankle only?

An ankle that swells on one side may have been strained or sprained, even when the original twist seemed minor. An Ankle Sprain can bring tenderness, bruising, and difficulty walking. An Ankle Fracture is more concerning when pain is severe, the ankle looks misshapen, or weight-bearing is difficult. Gout can present with a suddenly hot, red, very tender joint. Ankle Osteoarthritis may cause stiffness and swelling that builds with use. Swelling without an obvious injury can also relate to vein or fluid-flow problems, so the whole leg and your general symptoms matter.

For a recent mild injury, reduce walking, elevate the foot, and use a wrapped cool pack for short periods. Move the ankle gently if this does not increase pain, but avoid running, jumping, and forceful stretching. Wear supportive footwear and compare the left ankle with the other side for colour and size. Record the onset, any twist or fall, fever, skin changes, and whether the swelling is spreading. Do not massage a hot, unexplained swelling until a clinician has advised you.

Seek urgent care for severe pain, obvious deformity, inability to bear weight, a cold or blue foot, rapidly increasing swelling, fever with a hot red joint, or chest pain or breathlessness. Arrange medical review if the swelling has no clear cause, keeps returning, or is not settling. A clinician may assess the bones, ligaments, circulation, and joint before recommending imaging or treatment.

Could this be a sprain, fracture, gout, arthritis, or a circulation issue? Should I have imaging? How much walking is appropriate? What changes would mean I should return urgently?