Sneezing and runny nose in the cold can be caused by allergic rhinitis, common cold, vasomotor rhinitis and so on. 1. Allergic rhinitis: People suffering from this disease will suffer from nasal congestion, sneezing, runny nose and watery nose after being stimulated by allergens or allergic factors, and cold air stimulation is one of the triggering factors. 2. Common cold: some people are weak and susceptible to infection by disease-causing microorganisms after being exposed to cold, such as runny nose, nasal congestion, headache and so on. 3. Vasomotor rhinitis: this condition refers to a kind of inflammation of nasal mucosa caused by nervous system dysfunction or external stimulation, cold air may induce this disease, clinical manifestations of sneezing, runny nose, itchy nose, nasal congestion and so on. It is recommended that people with related conditions should go to the hospital to get a clear diagnosis, so as to carry out targeted treatment.