Yellow sticky snot in the nose can be caused by atrophic rhinitis, sinusitis and upper respiratory tract infections. 1. Atrophic rhinitis: when suffering from this disease, there can be an infection of the odoriferous nasal bacillus, and the symptoms of yellow sticky nasal mucus in the nose may occur. 2. Sinusitis: Sinusitis is an inflammatory lesion of the mucous membrane of the sinuses, and patients may experience symptoms of yellow sticky nasal discharge from the nose, and some patients may also experience nasal congestion, decreased sense of smell and headache. 3. Upper respiratory tract infection: upper respiratory tract infection, such as secondary bacterial infection, the patient may appear in the nose with yellow sticky snot symptoms. When patients have yellow sticky nasal mucus, they should go to the hospital in a timely manner, after clarifying the cause of the disease and actively cooperate with the doctor for treatment.