The first thing you need to do is to go to the hospital to check the cause of the runny nose and then choose a suitable treatment plan according to the situation. The common causes are cold and allergic rhinitis, which can be improved after active treatment. There are also some diseases that are clinically manifested as clear nasal discharge, such as cerebrospinal fluid rhinorrhea. 1, cold: anti-allergy drugs can be applied to treat the symptoms of frequent sneezing and runny nose, such as headache, fever, peripheral muscle aches and pains, oral antipyretic and analgesic drugs can be taken. Pay attention to keep indoor air circulation and prevent cold. Eat more eggs, milk, fresh green leafy vegetables and fruits to replenish protein and vitamins, while abstaining from alcohol, strong tea and coffee, and ensuring sufficient daily water intake; 2. Allergic rhinitis: often caused by allergens with clear watery nose, nasal congestion, nasal itching and paroxysmal sneezing symptoms, can be treated with oral or topical antihistamines under the premise of medical advice, and can also apply glucocorticoids for short-term treatment. If the symptoms do not improve, surgical treatment is feasible. Avoid contact with allergens, such as pollen and animal fur, reduce the number of indoor mites, keep the air humidity between 40% and 60%, dry the quilt and change clothes regularly; 3. Cerebrospinal fluid nasal leakage: In general, patients with cerebrospinal fluid nasal leakage should be treated conservatively first. The course of treatment may depend on the condition, and should be closely observed during the period. When conservative treatment is not effective, surgical repair is recommended.