Don’t drink too much coffee
Coffee temporarily loosens the lower esophageal sphincter, increasing the risk of acid reflux, according to studies. Caffeine may also be a factor, according to some evidence. Caffeine relaxes the lower esophageal sphincter similarly to coffee, which may result in reflux.
However, despite numerous studies suggesting that coffee and caffeine may make some people's acid reflux worse, the evidence is not completely conclusive. For instance, one review of observational studies discovered no appreciable effects of coffee consumption on self-reported GERD symptoms. However, when researchers used a small camera to examine the symptoms of acid reflux, they discovered drinking coffee was associated with more severe acid damage to the esophagus. Therefore, it may vary from person to person if drinking coffee makes acid reflux worse. It's advisable to skip coffee totally or consume it in moderation if you have heartburn after drinking it.