Make sure you drink lots of water, and consider using a humidifier in the bedroom to keep the mucous membranes in your nose, throat and eyes moisturised. This is especially important in winter when the humidity is lower.
Avoid mucous-forming foods such as dairy products, sugar and refined foods. Instead, eat a diet rich in fresh fruit and vegetables and whole grain products.
Don't eat a large meal just before bed as this can worsen the problem.
Airborne allergies such as animal hair, feathers and dust mites may trigger or aggravate post-nasal drip.
Don't allow pets into your bedroom, and swap your feather doona for hypo-allergenic bedding such as cotton sheets and blankets.
Specialised cleaning may be required to remove dust mites.