Coughing with phlegm in the morning but not during the day may be related to dry air, allergic rhinitis, pharyngitis and so on. Different causes, treatment focus is also different. 1. Dry air: Dry indoor air at night can stimulate the respiratory tract, and coughing occurs after waking up. There is no need for special treatment, patients can usually drink more water to replenish body moisture. It is also recommended to add a humidifier in the house, which can relieve the symptoms of coughing in the morning. 2. Allergic rhinitis: may cause morning sneezing, coughing with phlegm and other symptoms. First of all, we need to find allergens and avoid contact with allergens. Secondly, you can use some anti-allergy drugs such as loratadine, chlorpheniramine maleate and ibastine appropriately. 3. Pharyngitis: patients with coughing symptoms are not obvious, when the secretion accumulates in the pharynx, there will be coughing phlegm, commonly used compound borax solution, furacilin solution, compound chlorhexidine gargle solution and other gargles. If the pharyngitis caused by bacterial infection to use antibiotics, such as cefradine, azithromycin, amoxicillin and so on. Coughing up in the morning with phlegm and not coughing during the day may also be caused by other reasons, such as long-term smoking. If the symptoms are not relieved or aggravated, it is recommended to go to the hospital, to clarify the cause of the disease, and follow the doctor’s instructions for treatment, so as not to delay the condition.