Running nose breathing is not smooth, consider and allergic rhinitis, chronic rhinitis, vasomotor rhinitis and other factors. 1. Allergic rhinitis: If you feel that your breathing is not smooth or your nose is uncomfortable when you run, it is mainly considered to be related to allergic rhinitis. For example, if you run outdoors and come into contact with outdoor allergens, the nasal mucosa becomes congested and edematous, which may lead to poor breathing. 2. Chronic rhinitis: chronic rhinitis usually lasts for a long time and refers to chronic inflammation of the nasal mucosa and submucosa. Swelling of the nasal mucosa and increased secretions can affect breathing. Especially when running, the secretion increases, and the breathing feels more unsmooth. 3. Vasomotor rhinitis: the etiology of this disease is unknown, mental stress, anxiety, sudden changes in environmental temperature, endocrine dysfunction, can cause excessive release of parasympathetic neurotransmitters, or cause a non-specific release of histamine, vasodilatation, gland secretion increases, leading to the corresponding clinical symptoms. There are other possibilities for running nose breathing, so it is recommended to go to the ENT department of the hospital for examination to understand the cause.