The acid in your stomach is strong enough to burn your skin
So why doesn’t it burn your stomach? Because a thick layer of mucus protects the stomach lining and keeps the acid on the inside, where it’s churned with your food.
When gastric acid sometimes leaks up into the esophagus, which lacks this mucus layer, you know that burning feeling as heartburn. Proton pump inhibitors are drugs you can take to temporarily reduce acid production and allow the esophagus to heal.
Mangoes in South India were referred to as aam-kaay in Tamil, which became maam-kaay as a result of the numerous regional dialects there.