Do you smoke? If so, stop. This tends to make it worse. Talk to your docter, a preventive nose spray or other meds. may be helpful. Stay away from animals too. Sleep in a cool room. Make sure to vaccumm your mattress regular and keep a mattress cover on it and wash it often. Lots of things trigger this condition. Mites are the worse. So talk to your docter about it. You may need to carry a aerosol spray around with you to stop it when it first start to act up.