Drinking plenty of water and clear fluids helps thin mucus, making it easier to relieve congestion. Using a saline nasal spray or wash can also flush out mucus and ease discomfort. Over-the-counter decongestants, such as pseudoephedrine (Sudafed) or oxymetazoline nasal spray (Afrin), may provide temporary relief but should be used cautiously and for short durations to avoid rebound congestion. Antihistamines like loratadine (Claritin) can be helpful if allergies are the cause of the congestion