Many people with asthma find that reducing the frequency of their symptoms and flare-ups is one of the best ways to control the condition. This can be achieved by avoiding smoke, staying hydrated, and getting plenty of rest. Adding fruits and vegetables to the diet can also help to keep the lungs healthy. However, you should avoid foods that can cause gas and bloating, such as beans, carbonated drinks, onions, garlic and fried foods. It is also important to limit exposure to any substances that can trigger asthma, such as sulfites found in some dried fruits, cigarette smoke or cold air.