Milk has a reputation as a heartburn remedy, and there's a real reason it feels that way — it coats the throat and briefly buffers acid, so a glass can genuinely take the edge off in the moment. The catch is what happens twenty or thirty minutes later. Whole milk and full-fat dairy are relatively high in fat, and fat slows stomach emptying and can relax the lower esophageal sphincter, which often brings symptoms back worse than before.
What tends to work better
Skim or low-fat milk avoids most of the fat-related rebound while still offering some short-term soothing. Plain yogurt and kefir, taken in small amounts, are tolerated well by many people and add probiotics to the mix, though anyone with a known dairy sensitivity may find fermented dairy triggers symptoms regardless of fat content.
Cheese is its own category
Hard, high-fat cheeses are one of the more consistent reflux triggers reported anecdotally, likely for the same fat-related reasons as whole milk. If dairy is a question mark for you specifically, the more useful test isn't "does dairy cause reflux" in general — it's tracking your own reaction to skim milk versus cheese versus yogurt, since the fat content varies enormously between them.
This isn't personal medical advice. If dairy consistently triggers symptoms, that's worth mentioning to a doctor, especially if bloating or other digestive symptoms come with it.
