Three-month-old babies with a cold nose can be helped by massage, saline nasal spray, and medication to relieve symptoms. 1. Massage the sides of the nose: if the baby is only slightly nasal congestion, you can gently rub the sides of the baby’s nose to help relieve the symptoms of nasal congestion, or let the baby lie on his side to sleep, but also able to alleviate the problem of nasal congestion. 2. Saline nasal spray: you can buy baby special saline nasal spray to clean the nasal cavity, the nose inside the secretion to clean out, can effectively relieve the symptoms of nasal congestion. But be sure to operate according to the instructions to avoid the baby choking. 3. medication: if the baby cold and flu nasal congestion is more serious, accompanied by other symptoms, the need to consult a doctor in a timely manner to check the cause of the disease in the doctor’s guidance to take the relevant drugs to treat, to help alleviate the symptoms of nasal congestion. If the combination of bacterial infection, you can use antibiotics for anti-infection treatment, such as cefixime and so on. If your baby’s nasal congestion is not relieved for a long time, or is accompanied by other discomforts, you should consult a doctor and follow the doctor’s instructions to carry out targeted treatment, so as to avoid delaying the condition. All of the above drugs should be used under the guidance of a doctor.