A hot cold is usually not contagious.
Heat cold is the category of “wind-heat cold” in Chinese medicine, which refers to a series of symptoms such as fever, chills (fear of cold), coughing up phlegm, yellow snot, thirst, etc. After feeling the wind-heat evil, the lung qi is not propagated. Wind is one of the six evils, and has the characteristics of being good at traveling, good at moving, and easy to attack the yang position, but it is not contagious, so hot colds are not contagious in the crowd.
Patients with fever and cold, in life, should pay attention to their own living, ensure sufficient rest, follow the principle of light diet, nutritional balance, avoid spicy stimulating greasy food. And go to the hospital in time, under the guidance of the doctor, the use of wind-dispersing and heat-clearing drugs for treatment, such as mulberry chrysanthemum cold tablets and so on.