A very thick yellow colored snot in the nose is usually considered to be caused by an infection in the upper respiratory tract or rhinitis or sinusitis. And yellow-colored snot is usually caused by bacterial infections, such as staphylococcus and so on. At this time, it is necessary to consult the hospital in time for examination, to clarify the site of infection and the type of infection to carry out the appropriate anti-infection treatment. If the repeated infections are caused by abnormalities in the structure of the nasal cavity or sinuses, corresponding surgical treatments should be performed if necessary. Usually, we should pay attention to quit smoking and alcohol, and avoid the irritating gas environment, or contact with allergens that may cause nasal allergies, to avoid stimulating the nasal secretion more and more. In the cold season, it is necessary to pay attention to wearing a mask, in order to avoid the cold air to stimulate the mucous membrane of the nasal cavity, leading to an increase in secretion, or increase the possibility of infection.