Acidity is caused by a variety of factors, major ones being:
1.
Bacteria Helicobacter Pylori: It is usually contracted during childhood and in most people is present in the stomach though it does not cause any problems. In others, Helicobacter Pylori causes increased release of pepsin, which further causes acidity.
2.
Born acidics (Zollinger Ellison syndrome): Some people are said to be born acidic with no specific casue for acidity. Their bodies produce increased gastrin leading to excess acids
3.
Foods: Amongst the primary causes of acidity are the inappropriate food habits of today. Excessive intake of hot, spicy, fried foods , strong chocolate, tea, coffee, garlic, onions etc cause acidity. Acidity also arises by keeping the stomach empty for long time, by skipping breakfast.
4.
Lifestyle: The lifestyles we follow today also have a major role in causing acidity. Excessive intake of alcohol, smoking, lack of sleep, stress, anger, fear, excess worrying etc cause acidity. Also, intake of anti-inflammatory medicines and conditions like pregnancy, aging, obesity etc lead to Acidity.