In addition to this, the paste also works to reduce the pain at the site of swelling.
In case your lip swelling is an allergic reaction to a food item and the underlying cause is Angioedema.
What I recommend is that you go get a zip-lock bag, or a paper towel or two and wrap it around some ice cubes, you can then press this to the swollen area to reduce inflammation without harmful side affects.
Our mouth is the quintessential multitasker.