It is not normal for a cold patient to have a bad week, because the cold itself is a self-limiting disease with a duration of about one week. If the symptoms cannot be relieved for more than a week, we should consider whether complications such as lower respiratory tract infection, viral myocarditis, allergic rhinitis, etc. have occurred, as follows: 1. lower respiratory tract infection: including bronchitis or pneumonia, which requires timely improvement of blood analysis chest X-ray or lung CT examination for clarification; 2. viral myocarditis: especially when there are obvious symptoms such as chest tightness and panic, which requires timely improvement of electrocardiogram and cardiac enzyme profile for clarification; 3. 3. Allergic rhinitis: If there are recurrent symptoms such as runny nose and sneezing, the possibility of allergic rhinitis should be considered instead of common cold, and antihistamines should be given to relieve the symptoms, such as cetirizine hydrochloride tablets or loratadine tablets.