The cause of white sticky nasal mucus may be upper respiratory tract infection, chronic rhinitis and chronic sinusitis. 1. Upper respiratory tract infections: upper respiratory tract infections are mostly caused by viral infections, often appear sneezing, nasal congestion, watery nasal discharge symptoms. When the disease is stabilized and recovered or secondary bacterial infection, there may be white sticky nasal mucus. 2. Chronic rhinitis: mainly manifested as alternating or persistent nasal congestion, runny nose, nasal mucus is mainly white and thick. 3. Chronic sinusitis: the main symptoms are blocked nose, runny nose, nasal mucus is white and thick. White sticky nasal mucus consider more pathological factors, often triggered by chronic inflammation, it is recommended to actively go to the hospital after the onset of a clear cause.