Is there a way to cure both a stuffed nose and a sore throat?

Diagnosis first: Finding out the reason for the sore throat/stuffy nose is important. The two conditions may or may not be related. Allergies can cause a stuffed nose but usually not a sore throat. You can try over the counter cold/flu medicines to see if you get relief but if the condition persists for more than a couple of weeks, see your doctor.