I. Introduction.
With the arrival of autumn and winter, many people are starting to feel the discomfort of cold air. Nasal congestion is a common symptom that many people Xi think is caused by a cold. If nasal congestion lasts for a long time and is accompanied by other symptoms, allergic rhinitis may be at work. This article will introduce the symptoms, causes and prevention methods of allergic rhinitis in detail, so as to help you better understand and cope with this disease.
2. Symptoms of allergic rhinitis.
Allergic rhinitis, also known as allergic rhinitis, is a non-infectious inflammatory disease of the nasal mucosa. Its typical symptoms include: nasal congestion, runny nose, sneezing, and itchy nose. Some patients may also have eye symptoms such as itching, watery eyes, and red eyes. Here is a detailed description of these symptoms:
Nasal congestion: In people with allergic rhinitis, the nasal mucosa becomes congested and swollen, resulting in nasal congestion. This nasal congestion is usually intermittent or persistent, and in severe cases, it may interfere with normal breathing and sleep. 
Runny nose: People with allergic rhinitis have a watery nasal discharge that sometimes contains a small amount of mucus. Patients will have frequent runny nose during the onset of the disease, and even involuntary runny nose.
Sneezing: People with allergic rhinitis often experience paroxysmal sneezing, which is a reflex action caused by irritation of the nasal mucosa.
Nasal itching: Patients with allergic rhinitis experience an itching sensation in the nasal mucosa, which is due to irritation of nerve endings due to the release of inflammatory mediators. 
Ocular symptoms: Some patients may also have ocular symptoms such as itching, watery eyes, and red eyes. This is due to an allergic reaction in the eye caused by allergic rhinitis.
3. Causes of allergic rhinitis.
The causes of allergic rhinitis include both internal and external causes. Internal factors are mainly genetic factors and individual differences, while external factors include environmental factors and Xi lifestyle habits. Here are some common causes of allergic rhinitis:
Genetic factors: Allergic rhinitis has a certain genetic predisposition, and if there is a history of allergic diseases in the family, the risk of developing the disease increases accordingly. 
Environmental factors: Environmental allergens such as pollen, dust mites, animal dander, etc. are one of the main causes of allergic rhinitis. When an individual is exposed to these allergens, the immune system overreacts, leading to the appearance of rhinitis symptoms.
Lifestyle Xi Xi: Poor lifestyle habits such as staying up late for a long time, irregular diet, lack of exercise, etc., may lead to a decrease in immunity, thereby increasing the risk of allergic rhinitis.
Climate change: Climate change, such as cold air irritation and the alternation of seasons, may also induce allergic rhinitis. This is because changes in temperature and humidity can affect the normal functioning of the nasal mucosa, making it susceptible to irritation by allergens. 
Fourth, the prevention and treatment of allergic rhinitis.
The prevention and treatment methods for allergic rhinitis mainly include the following aspects:
Avoid exposure to allergens: Knowing and avoiding known allergens is key to preventing allergic rhinitis flare-ups. For example, patients with pollen allergies should minimize going out during pollen season;Patients who are allergic to dust mites should keep their rooms clean and wash bedding regularly.
Enhance immunity: Maintaining good lifestyle Xi, such as adequate sleep, reasonable diet, and proper exercise, can help strengthen immunity and reduce the risk of allergic rhinitis.
Medications**: In the event of an allergic rhinitis attack, medications** are the main means of relieving symptoms. Commonly used medications include antihistamines, hormonal drugs, decongestants, etc. However, it should be noted that the drug** should be carried out under the guidance of a doctor, and should not be purchased and used on your own. 
Physical**: Physical** methods such as nasal irrigation, nebulized inhalation, etc., can also help alleviate the symptoms of allergic rhinitis. These methods can help remove allergens and secretions from the nasal passages and reduce mucosal swelling and congestion.
Psychological adjustment: Patients with allergic rhinitis are prone to psychological problems such as anxiety and depression. Appropriate psychological adjustments, such as maintaining a positive attitude and seeking social support, are of great significance to alleviate symptoms and improve quality of life.
V. Conclusions. Cold nasal congestion can be a manifestation of allergic rhinitis. Understanding the symptoms, causes and prevention of allergic rhinitis can help us better cope with the disease. In daily life, we should try to avoid allergens, enhance immunity, maintain good Xi habits, and carry out appropriate medications** and psychological adjustments to reduce the risk of allergic rhinitis and improve the quality of life.