This is a common problem! We all pass gas and or experience burping but for some people, these symptoms can be really bothersome.  It is important to recognize that everyone has gas in the digestive tract.  When there is some gas and fluid in the intestines, movements (contractions) of the intestines to propel the contents onwards may cause rumblings.

There two major causes of excessive gas :

1. First, subconscious swallowing of air can result in excessive burping.  Eating slowly, avoiding gum chewing and smoking, rectifying problems that lead to phlegm accumulation in the back of the throat (such as postnasal drip), and correcting a habit of clearing the throat and swallowing can help minimize air swallowing.  Belching often induces instinctive reflex swallowing with further gas accumulation so you need to make a conscious effort not to swallow after each belch.
2. And second, gas can form as a result of the breakdown of certain dietary items, especially carbohydrates, by bacteria normally present in the large intestine. Foods that cause gas include beans, broccoli, cabbage, fruit drinks, carbonated drinks, and dairy products.  Beano (obtainable over-the-counter) may help to reduce gas formation when you have a lot of vegetables and fruits at any meal.