The sinus disorders can be prevented if we can avoid cold or bacterial infections. A well-balanced diet, and exercise can help the body function at its most efficient level and maintain a general resistance to infections. A diet that supplies plenty of vitamins and minerals to reinforce your body`s defence system can aid recovery and help to prevent further attacks. Chronic sinusitis may be the result of infection or an allergy to particular foods, such as dairy products, cereals or even soy products causing the mucous membranes to swell.