You will see a soft bladder-like swelling on the underside of the tongue, and your cat will show distress in eating. This generally requires an operation.
You will note a dark red line near the teeth. This is a common condition in travel with cats but is not completely understood. It may be due to poor nutrition, infection (local or general), vitamin deficiency, anemia, poor teeth, or a combination of these. Vitamin supplement, antibiotics, daily gum massage, and proper care of the teeth will alleviate this condition.
Map of Dernbach bei Montabaur Photo Gallery