Basically acidity is of two types-
1) Hyperacidity- Generally starts during empty stomach or before meal, feels better after taking milk or sweet items or ice-cream
2) Hypoacidity (or ‘Acidity of water’) – Generally starts after meal, sometimes associated with headache, feels better after vomiting or after taking buttermilk or taking lukewarm water.

Important Note: Both the acidity has opposite line of management and even the treatment packages are different as well. So, one has to decide first that which type of acidity he/she may suffer, then select the appropriate acidity package for his/her treatment.