Kissing someone who has a cold is a behavior that can lead to infection, thus causing the onset of a cold. Cold is a disease caused by pathogen infection; for common cold, the possibility of contagion through kissing will be relatively low, but if it is caused by influenza virus infection, then it is easy to spread through the respiratory tract, so the possibility of being infected by kissing a person with influenza will be higher. In conclusion, kissing someone with a cold may cause a healthy person to catch a cold, but the specific infection depends on which type of cold it is, and also depends on the individual’s physical condition; individuals should pay attention to protect themselves during the cold epidemic season. If you feel unwell, you should go to the hospital and consult a physician.