If the nose is not working and the mouth is dry, there are usually several factors as follows.1. The most common factor is infectious factor, which usually occurs when you have a cold and the nose is not working and the mouth is dry, you can apply anti-inflammatory drugs, for example, anti-inflammatory antimicrobials can reduce inflammation, erosion, exudation and oedema in the nasal cavity, which can make the nose work and relieve the dryness of the mouth. 2. Anti-inflammatory drugs, such as levofloxacin or roxithromycin, azithromycin, etc. can be taken to treat the above symptoms.2. If the cold is caused by viral factors, and the nose is not working and the mouth is dry, antiviral drugs, such as oseltamivir, can also be taken.3. From the perspective of traditional Chinese medicine, it is a wind-cold type of infection, and the application of wind-cooling Chinese medicine can be used to dispel wind-cold, and can take the traditional Chinese medicine Banlangen or Shuanghuanglian, etc..4. Drinking a lot of warm water can also alleviate the above clinical effects. 5. Apply nasal vasoconstrictor drugs, such as ephedrine nasal drops, etc. can alleviate the symptoms as mentioned above.