Juniper berries and juniper oil have both proven themselves to be effective in relieving bronchial congestion. The berries are rich in antioxidants that boost the function of the immune system, while the oil is a well known decongestant and expectorant. Bronchial congestion is characterized as inflammation of the mucus lining in the respiratory tracts, but inhaling juniper oil can cut through that congestion and promote normalized breathing. By clearing the sinuses and promoting the expulsion of phlegm and mucus, juniper oil is a wonderful remedy for bronchial congestion.