Most babies are still infants at 6 months of age. After 6 months, the mother’s antibody protection is gone, so babies after 6 months are more prone to colds than in the first 6 months. The common symptoms of cold are nasal congestion, sneezing, runny nose and cough. So when a 6-month-old baby has a stuffy and runny nose, we consider that the baby has a cold. First of all, we need to give the baby more water, while keeping the indoor air moist, avoid contact with adults who have a cold, and if the adults who have a cold must look after the baby, they must take cold medicine and bring a thick mask to prevent further infection to the child. You can apply warm towels to the root of the nose and rinse the nasal passages with physiological sea salt water. If this treatment, still have the symptoms of a cold, you can give the child to take pediatric cold medicine, because the vast majority of colds are self-healing, so the use of drugs must be careful, drugs must be under the guidance of a doctor, do not just buy their own medicine for the baby to eat, for 6 months of age, if the baby is a clear water-like nasal discharge, you can take Desloratadine drops, which is also very effective in relieving a runny nose very good. In short, a stuffy and runny nose means that your baby has a cold. Active symptomatic treatment is very important, most colds are viral infections, so do not use antibiotics on your own while treating your child symptomatically.