A hot shower will clear the nose and allow normal breathing at night.
Essential oils, especially ones containing eucalyptus, will help you breathe more freely and also help you get better sleep.
Using products that help clear sinuses like Vick’s Vaporub will unclog the nose and allow for better airflow.
Also, make sure you treat any nasal infection once it appears. Otherwise, you may end up getting various complications such as an eternally clogged nose, for example. Cavities and gum inflammation may also cause excessive drooling. Solutions: