One of the most common problems we experience in winter is 'being cold'. When we go out in cold weather without dressing thickly enough, when the indoor heating system is not at the ideal temperature setting, we feel cold! In this season, we can see being cold as a normal situation by saying 'it is due to the cold'. But beware! The feeling of cold, which almost all of us complain about in cold weather, can also indicate some important diseases. Acıbadem International Hospital Internal Medicine Specialist Dr. Türker Kundak warned that the complaint of cold should definitely not be ignored and said, “Because cold can be an important symptom of the Omicron variant during these periods, it should not be underestimated. In addition, since it can be caused by many other serious diseases, it is absolutely necessary to apply to a health institution, especially in cases where there is no infection and the complaint of cold is prolonged. Internal Medicine Specialist Dr. Türker Kundak told about the important diseases that cause cold and gave warnings!