The reason may be related to rhinitis, sinusitis, bronchitis and other reasons, according to the specific condition, choose the appropriate treatment. 1. Rhinitis: If you suffer from rhinitis, you can choose different treatments according to different causes and types. Saline can often be used to clean the nasal cavity, and allergic rhinitis is often treated with antihistamines such as levocabastine hydrochloride tablets, cetirizine tablets, and loratadine capsules. 2. Sinusitis: If you suffer from sinusitis, it can cause phlegm. Cefuroxime, amoxicillin, clarithromycin and other medications should be selected under the advice and guidance of the doctor, nasal spray glucocorticosteroids, such as budesonide nasal spray, fluticasone propionate nasal spray and so on. Part of the conservative treatment effect is not good patients can choose surgical treatment. 3. Bronchitis: Bronchitis will have symptoms of rhinitis in the early stage, manifested as increased nasal secretions, followed by coughing and coughing up sputum. Should be examined by a specialist after the use of azithromycin, moxifloxacin and other antibiotics anti-infective treatment, with aminoglutethimide, acetylcysteine phlegm treatment. If the snotty nose and phlegm continue to be unrelieved, it is necessary to go to the hospital in time for examination and standardized medication and treatment after a clear diagnosis.