Babies with only clear runny nose need to be judged according to the etiology, if it is an upper respiratory tract infection caused by environmental factors and viruses, the use of drugs is not recommended. If it is allergy, it is recommended to use anti-allergic drugs. 1. Environmental causes: when the child only runny nose, and there is no other symptoms of discomfort, may be just to the surrounding environment temperature is not adapted to, add clothes or improve the environment can be improved. 2. Virus-induced upper respiratory tract infections: generally can be self-healing, without special medication. Runny nose itself is the body in the discharge of germs in the body, daily through hot compresses, saline nasal cleaning to relieve nasal discomfort. 3. Allergy: If the baby has a lot of runny nose symptoms and accompanied by itchy eyes or nose symptoms, may be caused by allergic rhinitis, you can choose anti-allergic drugs for treatment, such as cetirizine, loratadine and other drugs. When the child appears to runny nose symptoms, it is recommended to take the baby to the hospital in time for examination and diagnosis, and under the guidance of the doctor for medication, do not unauthorized use of medication, in order to avoid adverse reactions.