Swollen ankles occur when fluid builds up in the tissues of your lower legs.
1 This can happen for a variety of reasons, including;
Eating too much salty food
When you consume large amounts of salt, your body holds on to extra water to dilute the sodium. This can lead to fluid retention, which can cause your ankles and feet to swell.
Too much salt can also have negative effects on your blood pressure and put you at risk for heart disease. If you’re struggling with swollen ankles, cut back on salty foods like chips, pretzels, and processed meats. You should also avoid adding extra salt to your meals.