A low carbohydrate diet can cause an attack. UTMB has an excellent nutritionist at the testing facility and she will work with you to try to sort out how your diet may be affecting you. They provide you with 3 meals a day to see what you actually eat. Then they analyze the data and advise you on how to improve your diet. My sister and I were surprised to find out we weren't eating as well as we thought we were.
Environmental factors are also suspect for bringing on attacks.
Some studies suggest that the chemicals that are found in cigarettes, insecticides, and household cleaners have this potential. I have noticed that even paint fumes can bring on symptoms in some people. Barbiturates are commonly used as tranquilizers, sleeping pills, and general anesthetics. Sulfa drugs are antibiotics commonly used to treat kidney and bladder infections. Sulfa is also found in drugs like Celebrex for arthritis.