If it's a stuffy nose, use saline drops and the blue ball thing for boogies (we call it the booginator) about every 3-4 hours. Works like a charm for us. Hope everyone feels better soon! Call the docs office for anything serious like a high fever.
Really the only meds you can give him/her is fever reducer. There are no decongestants or cough suppressants on the market for kids under 4 years old. Saline drops with the blue bulb do help, try to elevate him/her while laying down, Vicks Baby rub on the chest, and a humidifier w/ Vicks liquid are about the only things you can do.
sitting in a hot steamy bath room will help with the runny nose! if ur breast feeding put some breast milk down his nose, it works just like the salin drops only free! some vicks on his feet a night work great too!