Licorice contains glycyrrhizin (the sweet taste) and glycyrrhetinic acid
both of which are anti-inflammatory are responsible for reducing symptoms of

However, both of these constituents also have mineralocorticoid activity which may result in hypokalaemia (low potassium), hypertension and oedema if taken in large amounts over a period of time.

Extra potassium containing foods can be used to help counteract this effect
but if symptoms of puffiness do start to occur then the dosage must be stopped.
Symptoms will then reduce very quickly.