Other causes of ankle edema are gout,ankle arthritis,impairment of the blood flow to the
ankles due to some blood clot,
varicose veins etc.Also remember that eating a poor diet high in salt and carbohydrates , abusing laxatives, diuretics, taking birth control or hormone replacement therapy pills, pre menopause,kidney or liver pathologies, sodium retention and neuromuscular disorders can also cause such ankle edema.