Joint dislocation refers to the loss of proper alignment between the joint surfaces, leading to the loss of function. It is often accompanied by swelling, joint deformity, and severe pain. In severe cases, it may also cause damage to blood vessels and nerves. If you are not familiar with the skeletal structure, do not attempt to realign it yourself to avoid causing further injury. If realignment is unsuccessful, immobilize the affected limb and seek medical attention, and at the same time, apply cold compresses to relieve pain.