other reasons for edema

It happens often, if you use sodium like before - the body is more sensitive and absorbs better after fast. The kidneys may or may not be yet fully functional; while mineral balance esp. potassium and Magnesium may not be yet back to normal.
People esp. women get it often without fasting as well. Attributing it to period, to standing too long on their feet, etc; it can be result of low blood albumine, which I do not suspect in the case of Olivia. Tweet