Hello Mr. Vidyadharan,
Thanks for writing in.
Unfortunately, there is no permanent treatment of allergic conditions. But if you can identify what you are allergic to, it can help things to quite a great extent. The following measures will help prevent attacks:
a. Keep your house and place of work extremely clean. Get rid of unnecessary carpets, pets and any kind of thing which is difficult to maintain
b. Take steam inhalation atleast twice a day.
c. Sodium cromoglycate is a drug available as a rotahaler ( a different form of an inhaler) which can help to prevent attacks. Since this is a prescription drug, please speak with your physician about this.
d. Vitamin C
has been shown to prevent and take care of allergies. So have plenty of citrus fruits.
e. Have a healthy and balanced diet. This with an exercise program will help you improve your immunity in general.
Hope this helps.