Frequently vomiting after eating spicy food suggests your stomach lining may be inflamed or highly sensitive, which is commonly seen in acid reflux (GERD) or gastritis. While drinking water temporarily dilutes stomach acid, it is not a cure. Over-the-counter H2 blockers (like Famotidine) or Proton Pump Inhibitors (like Omeprazole) can reduce stomach acid and help prevent this. However, because frequent vomiting can damage your esophagus, you should consult a doctor for a proper evaluation and diagnosis before starting any daily medication. For now, the best prevention is to avoid spicy triggers and eat smaller, milder meals.