C.C.
Bloating can be a sign of food intolerance such as gluten (wheat) and lactose (milk). Make a diary of your food and see what the triggers might be. Ask your doctor for a test for Celiacs disease and have him do a lactose breath test, also.
Also, I was always bloated for about a year then went off gluten and lactose. I stopped being bloated and my asthma completerly disappeared.