A cold is usually a viral infection. A runny nose is the beginning of a cold and is accompanied by other symptoms such as nasal congestion, runny nose, cough, coughing, sore throat, and systemic symptoms such as fever, headache, general malaise, and loss of appetite. As the disease progresses, the clear nasal discharge can turn into yellow pus nasal discharge, which represents a bacterial infection. Fever usually lasts for 3 days and can return to normal body temperature. Viral colds tend to be self-healing and usually return to normal in 7 days. Take rest, drink more water and eat more fresh vegetables and fruits during the cold to facilitate the recovery of the cold. If the symptoms are more obvious, you can treat the symptoms with medication. If you have yellow nasal discharge, you can take antibiotics like amoxicillin, cefradine, and also compound licorice tablets.