Viral colds primarily affect the nasal area, with severe runny nose that is mostly clear and lacks pus-like discharge. When coughing, there is little phlegm. Symptoms of bacterial colds mainly occur in the tonsils and throat, showing redness and swelling of the throat, enlarged tonsils, and throat pain. The nasal discharge is generally thick, and the cough brings up thick phlegm. Viral colds do not show any abnormalities in routine blood tests, whereas bacterial colds often display an increase in white blood cells.