Allergic rhinitis and colds have many similar symptoms, and sometimes taking cold medicine can have some effect, so it’s easy to get confused. The reason why it is important to distinguish allergic rhinitis from a cold is that a cough combined with allergic rhinitis means that you probably have cough variant asthma, while a cough caused by a cold can be diagnosed as a post-infectious cough, which is treated differently. If you treat allergic rhinitis as a cold, it can have some effect, but it can’t cure the root cause, and you need to take medicine repeatedly. Cold is mostly caused by wind and cold, manifested as nasal congestion and runny nose, which starts as clear snot and can turn into yellow snot after a few days. Allergic rhinitis is caused by contact with allergens. When you encounter allergens, cold air or the smell of smoke, you will have an itchy nose and sneeze, sometimes more than a dozen times in a row, followed by a runny nose and some nasal congestion. It often recurs. Allergic rhinitis is perennial or seasonal. Allergic diseases are related to the constitution and have a genetic predisposition, which is the result of the combined effect of environment and genetics. Antihistamines such as paracetamol and cetirizine (commonly known as anti-allergic drugs) are taken during attacks.