Medicated Swabs #1 Pharmacist Recommended Brand for Adult Oral Pain Instant Pain Relief Canker Sores Cold Sores Gum Irritation Cheek Bites Irritation from Dentures or Braces Benzocaine 20% Oral Pain RelieverUse:Â for the temporary relief of pain associated with: Canker Sores Cold Sores Fever Blisters Minor irritation or injury of the mouth and gums.