How long does a cold last? Normally, a common cold can recover within 5-7 days. Influenza might have a slightly longer duration, generally requiring 7-10 days to resolve. The specific situation also depends on the virulence of the cold virus, the body's immune capability, the amount of virus, and the body’s resistance. There are some clinical variations. The common cold itself is a contagious, self-limiting disease, caused by viral infections like influenza or parainfluenza, leading to respiratory infections. The main treatment involves drinking plenty of water, resting, symptom management, and preventing complications.