It is mainly due to allergic rhinitis, which is caused by cold air stimulation or contact with allergy-prone substances, which will stimulate the nasal mucosa to produce allergic reactions, easily causing sneezing, runny nose, nasal congestion, and also causing watery eyes, itchy nasal cavity and eyes. If this situation occurs frequently, it is best to go to the hospital for examination first. If it is caused by allergies, you need to take oral anti-allergy drugs, such as paracetamol, loratadine, cetirizine, etc. You can also use Fangfengtongsheng Wan under the guidance of a Chinese medicine practitioner, and you can also use Yu Pingfeng San if you have a weak constitution. You should also pay attention to protection in general, wear a mask when you go out, and try to avoid contact with irritating substances that can easily cause allergies.