Tight clothing around the abdomen — waistbands, belts, shapewear — can worsen reflux through simple mechanical pressure. Anything that compresses the stomach increases internal pressure, which pushes up against the LES and makes it more likely to open when it shouldn't, similar to the effect of a large meal or excess abdominal weight. This is often an overlooked trigger because it's not diet or sleep related, so people don't always connect a flare-up to what they're wearing. It tends to matter most right after eating, when the stomach is already fuller and under more pressure from digestion — wearing something restrictive during or right after a meal compounds that effect. Loosening a belt after eating, choosing looser waistbands for meals, and avoiding tight shapewear right after a large meal are small, low-effort adjustments that some people find meaningfully reduce symptoms.
