Brief answer
given below

Detailed answer
Hello,
Thanks for the query.

Most of the times the causes for such bloating and gassy feeling in morning is due to bad lifestyle and sometimes it can be due to the person not tolerating some particular type of food.
The bad lifestyles which result in such symptoms are....
-Taking heavy and greasy food in night.
-Taking food very late in night and going to sleep immediately.
-Less consumption of water, unclean water or unhygienic food
-Consuming excess of alcohol
-Smoking
-Sedentary life style which includes more of sitting job,less movement and not exercising in morning
-Consumption of pain killers often.
-Eating your food quickly and talking too much while eating

There is a long list of goods which can produce gas in the person and the list includes ...
Milk and milk products 
Colas 
Starchy foods like potato and pasta
Fruits like banana,peaches,raw apples.pears etc
Beans and lentils
Cauliflower, broccoli, peas, carrots, onions, corn etc.

I would advise you to go through the above factors and try to find the cause and then we can discuss about it.
Since you are very young,the chances of some health disease looks less likely.
As far as your weight is concerned ,you must see that it should be within your BMI.
It would be of concern if your weight is below the required range of your BMI.

I hope it helps,however you may revert to me for any further query.
Best of luck
Thanks

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