Every day sleep ankle is very uncomfortable to consider ankle fatigue, ankle arthritis, ankle varicose veins and other factors. 1. Ankle fatigue, due to excessive exercise during the day, or long-term fatigue exercise, resulting in ankle muscle tissue fatigue, acidic metabolite generation, sleeping ankle discomfort. 2. Ankle arthritis, due to trauma, cold, joint degeneration, chronic strain, rheumatic diseases and other aseptic inflammation of the ankle, often appear at night in the ankle redness, swelling, pain. 3. Ankle varicose veins, venous obstruction leads to local blood circulation obstacles, metabolic products can not be eliminated after exercise, local tissue malnutrition, discomfort symptoms. If the discomfort in the ankle is not relieved at night, it is recommended to consult a doctor for treatment under the guidance of a physician.