A five-week-old baby boy with a runny nose that has been bad for ten days may be due to allergic rhinitis, sinusitis, upper respiratory tract infections and other causes. It can be treated by staying away from allergens, using medication, drinking more water and other methods of relief. 1. Allergic rhinitis: If a five-week-old boy is in contact with allergic substances, he can have a runny nose for ten days. Should promptly detach from the allergic environment, avoid eating food that may be allergic, if the allergic symptoms are serious, can follow the doctor’s instructions to use drugs such as loratadine and other drugs anti-allergy treatment. Also can be localized to be budesonide nasal spray for treatment. 2. Sinusitis: If the child is due to infection pathogens triggered by sinusitis, there will also be five-year-old boy with a runny nose for ten days, accompanied by headache, nasal congestion, loss of smell and other symptoms. At this time, the child should pay attention to light diet, drink more water. If the combination of bacterial infection, can apply antibacterial drug treatment, such as cefixime and so on. 3. Upper respiratory tract infection: runny nose for more than ten days to consider the possibility of viral infections, can be prescribed to the sea saline nasal spray, phlegm suction and other symptomatic supportive treatment to alleviate the symptoms. After a period of time, the disease can improve on its own. Note that the above drugs should be used under the guidance of a doctor, avoid unauthorized use of drugs, so as not to cause adverse effects. If a five-year-old boy has a runny nose, it is recommended to consult a doctor, complete the relevant examinations, clarify the cause of the disease, and follow the doctor’s instructions for targeted treatment.