No , eating lemon does not cause gas. The notion that eating citrus or nuts can cause ulcers or gas problems is wrong. The idea that eating pickled fruits is acidic is a common misconception in our society. The fact is that although the fruit is acidic in nature, when it reaches the stomach, it mixes with the saliva and becomes alkaline or alkaline. It is not responsible for the gas problem at all , but it does benefit the problem. And yes , those who have stomach problems should not eat lemon. You think that lemon itself is acid , so it produces gas. Good news for them , this idea has been proven wrong. Please do not blame the rich lemon for the problem of ulcers.