Avoid exposure to irritants such as cigarette and cigar smoke or strong chemicals.To avoid infections, wash hands frequently during common cold season and try to avoid touching your face.If you have allergies, avoid exposure to allergy-inducing substances, Decontaminate your decor. Minimize dust that may worsen nighttime symptoms by replacing certain items in your bedroom. Prevent mold spores. Clean damp areas in the bath, kitchen and around the house to keep mold spores from developing. Consult Allergy specialist...