A blocked nose, runny eyes and sneezing like this is almost always a viral cold, and it usually runs its course in about a week on its own. An antihistamine-decongestant combination available over the counter can ease the blockage and sneezing while your body clears the virus.
Next Steps
Steam inhalation twice a day, warm fluids and salt-water nasal rinses help loosen congestion naturally. If you develop fever, facial pain or the cold hasn't eased by day 7 to 10, see a general physician to rule out a secondary infection.