my son suffering from fever and runny nose with dry cough and he is 18 months old.

A. Give steam inhalations 4 to 5 times a day for cold and cough, use baby vicks, use nasal drops for nasal block. Use paracetamol in proper dose for fever and repeat every 4 hours if required. If not improvement and accompanied by other symptoms like vomiting or loose motions or breathlessness or dullness, poor intake consult your paediatrician asap.