Clinically speaking, thick yellowish nasal mucus is usually a sign of a co-morbid bacterial infection. Common common upper respiratory tract infections, also known as upper respiratory kata symptoms. Early clearing of the nose will be followed by a thick nasal discharge, which usually improves in about 5-7 days. If the common upper respiratory tract infection is not accompanied by fever, simply thick nasal mucus is not the need to use anti-inflammatory drugs, because their own resistance can resist the bacterial infection, will not develop into a systemic inflammatory reaction. It is important to note that if you have chronic yellow nasal discharge, you should consider whether you have sinusitis. It is best to go to the ear, nose and throat department to do the relevant examination, do sinus CT examination to see whether there is chronic sinusitis. If there is inflammation to be regular anti-inflammatory drug treatment, because once the development of chronic sinusitis, relatively not easy to cure, easy to recur, so it is best to cut off the root of the problem, regular treatment.