If a 4-month-old baby has the symptoms of cold, nasal congestion and runny nose, if the symptoms are not very serious, you can first give the child more water and then use the method of pediatric massage for treatment, the side effects are less and the effect is better, but if the symptoms are more serious, you can not simply rely on pediatric massage for treatment, you need to give the child early medication for treatment. Because children are small and have weak resistance, it is easy to aggravate the infection. You can give your child pediatric black beetle and clear fever pellets, An’erning pellets and pediatric aminophenol pseudo-lax dispersible tablets for treatment, which is more effective. If there is a yellow runny nose, it indicates a combined bacterial infection, which needs to be treated with antibiotics with better effect, for example, the baby can take pediatric cefixime granules for anti-inflammatory treatment. If there are allergies, you can give your child azithromycin for anti-inflammatory treatment.