Sometimes dentures can cause pain or discomfort, especially if your dentures are old or ill-fitting. An effective home remedy you could try is using black tea bags! Black Tea is full of tannic acid, an astringent that helps reduce pain, as well as, reduces swelling of the gums. Tannic acid also repels harmful bacteria. Steep a black tea bag in a cup of hot water for 5 minutes. Remove the tea bag and set aside to cool off. Hold it on the affected gum area for 10-15 minutes then rinse your mouth with warm water. Repeat 1-2 times daily. (Note: not intended to replace consultation with a medical professional.)