Can you get an ulcer from kissing?

No, you cannot get an ulcer from kissing. Ulcers are sores that develop in the lining of the stomach, small intestine, or esophagus. They are caused by a variety of factors, including infection with the bacterium Helicobacter pylori, use of certain medications, and excessive alcohol consumption. Kissing does not transmit H. pylori or any other bacteria that can cause ulcers.