Benzodent is great stuff.
Naturally, I have to advise the with any mouth sores, your dentist should be your first source for relief. That said, I have been a denture wearer for years, and when I first got my dentures, I may not have been able to endure the sore spots. But using Benzodent numbed the pain, and provided a cushion to pad the area while it healed and my mouth became accustomed to the dentures. Now, I have new dentures and the same situation applies. I am able to keep the dentures in place, ease the irritated areas and continue to eat, while I wait for my dentist to adjust the dentures after the holidays. I've only been able to find this product online, though. Not in stores.