How do you diagnose common cold?

Clinically diagnosed: Your doctor will make the diagnosis of a common cold based on your signs and symptoms by performing a history taking and a physical exam. The common cold generally involves a runny nose, nasal congestion, and sneezing. You may also have a sore throat, cough, or headache.

Common symptoms: It is diagnosed by the common symptoms of sore throat, runny or congested nose and in 30% of cases dry cough.