You seem to be suffering from allergic airway disorder which usually will be associated with turbinate hypertrophy. DNA as such has no correlation with allergy symptoms and may be a incidental finding. You may need to take anti Histamine tablets, steroid nasal sprays along with steroid bronchodialator inhalers for long term benefits. There is no permanent cure for this condition and physical exercises can be of some benefit
Next Steps
Consult nearby allergy specialist for more information about the treatment of allergy