Aloe Vera and Tea Tree Oil
A mixture of clear aloe vera gel and tea tree oil, in a 2:1 ratio, helps soothe dermal inflammation of any kind and, as such, is helpful in managing swelling of the lips too. Apply this paste on the swollen lips and let it dry. Thereafter, wash it off with cold water. You may repeat this procedure a couple of times a day if the swelling does not subside.