The sneezing and sniffling of just-full-month-old babies may be caused by cold air stimulation, upper respiratory tract infection, etc. It can be treated by general treatment, medication, etc. Depending on the degree of the condition, there will be differences in treatment, and it is recommended that patience be maintained in the treatment. 1. Cold air stimulation: newborn babies may sneeze and have a runny nose once in a while after being stimulated by cold air, usually no special treatment is needed, just avoid letting the baby be stimulated by cold air again. 2. Upper respiratory tract infections: just full-month-old baby if always recurring sneezing and sniffling, may be caused by upper respiratory tract infections, can be diagnosed in the doctor’s use of proprietary medicines for treatment, such as PuDiLan anti-inflammatory oral solution, JianEr QingLiYi solution and other effect of the milder drugs to alleviate the baby’s symptoms. In addition, you can also add sea salt water nasal spray, sputum suction symptomatic supportive treatment. Pay attention to the indoor temperature and humidity to avoid aggravating the baby’s condition. The medication should be used strictly according to the doctor’s requirements to use drugs, do not arbitrarily increase or decrease.