Clear runny nose in summer is mostly considered to be caused by wind-cold cold, which is mainly caused by blowing air conditioner or fan, and usually there are also symptoms such as cough, coughing phlegm, headache and fever. You can use cold and fever granules and wind-cold granules for treatment, together with symptomatic medications to control the symptoms. Some patients have clear runny nose in summer, which may also be caused by allergic rhinitis rather than a real cold. Allergens cause congestion and edema of the nasal mucosa and increase secretion, which in turn leads to symptoms such as clear runny nose and sneezing. You can use drugs for rhinitis, such as loratadine anti-allergy, budesonide nasal spray, and also use Chinese medicine such as Sinopressin granules and nasal abdomen and tongkou granules. Patients should pay attention to drink more water to accelerate the metabolism of the body. The diet should be light and avoid eating too much spicy, stimulating, cold and greasy food to avoid aggravating the discomfort of the organism. At the same time, attention should be paid to the appropriate increase and decrease of clothing to reduce the occurrence of colds.