The baby has been running nose for several months, may be caused by repeated colds, chronic rhinitis, nasal polyps and other factors, it is recommended that parents take the baby to the hospital in a timely manner, so as to avoid the condition of the delay, affecting the baby’s health. 1, repeated colds: if the baby resistance is poor, there may be repeated colds, which caused the runny nose for several months. Parents should take the baby to the hospital in time, follow the doctor’s instructions to give the baby to take drugs to treat colds to ease the condition, such as pediatric cold particles, pediatric black bean and chiao clear heat particles and so on. In addition, the baby should be given increased nutrition, moderate physical exercise, enhance the baby’s resistance, reduce the chances of recurrent colds; 2, chronic rhinitis: if the baby suffers from upper respiratory tract infections but the treatment is not timely, it may lead to the occurrence of chronic rhinitis, which appears to have been a runny nose for a few months of the symptoms. In addition, if the baby is often exposed to allergic substances, allergic rhinitis may also occur, resulting in a runny nose for several months, it is recommended to go to the hospital, to be budesonide nasal spray, fluticasone propionate nasal spray and other medications for treatment, and with the nasal lavage and other relief of the symptoms, and at the same time, to avoid re-exposure of the baby to allergenic substances, so as to avoid aggravation of the symptoms; 3, nasal polyps: nasal polyps, may result in repeated exposure to nasal polyps, may result in the occurrence of symptoms. Nasal polyps: nasal growth in the nasal cavity, may cause repeated irritation, resulting in the baby has been running nose for several months are not good, but also accompanied by nasal congestion performance. It is recommended to go to the hospital in a timely manner, a clear diagnosis, and follow the doctor’s instructions to the baby to use glucocorticoids for treatment, such as mometasone furoate nasal spray, or take surgical resection method of treatment.