Garbage dumps for a long time, coupled with the role of bacteria, will give off a bad smell. Some people think there is a special smell in their noses, while others don't. In fact, it may not smell at all. It's called subjective stench. In addition, some people may not feel the stench themselves, while others obviously feel the stench. In fact, stench does exist, which is called objective stench. (1) Objective malodor: It is common in some diseases of nasal cavity or whole body, and needs to be checked and treated in time. ① Foreign bodies in nasal cavity: it is more common in children, because foreign bodies cannot be discharged from nasal cavity and cannot be informed to adults in time. After a long time, foreign bodies remain in the nasal cavity, causing mucosal inflammation, mostly unilateral nasal congestion and purulent nasal discharge. ② Atrophic rhinitis: It is more common in young people, because most people suffering from this disease have a sense of smell failure, and I can't smell the bad smell, but others can't stand it and often stay away from him. Some patients with bad smell will smell bad smell if they are far away from them, so they are called smelly nose disease. ③ Malignant tumor: more common in middle-aged and elderly people. In addition to the smelly nose, it is often accompanied by symptoms such as spontaneous bleeding and headache. Therefore, middle-aged and elderly people have no obvious reason, but they have nasal odor or frequent nosebleeds, so they should find a doctor for examination and treatment in time. ④ Osteomyelitis: Frontal osteomyelitis and ethmoiditis of children with maxillary osteomyelitis. There may be a bad smell when pus flows, which is mistaken for the smell of nasal cavity. ⑤ Cheese rhinitis: The nasal cavity or sinuses are filled with tofu-like dirt, which destroys bones and produces stench. (2) Subjective malodor: ① Purulent secretion of sinusitis often smells fishy; Especially odontogenic maxillary sinusitis, its secretion is often very unpleasant, and only the patient can smell it. ② Extranasal causes: such as nasopharyngeal lesions, tonsillitis, dyspepsia, stomach diseases, etc. Patients often think that there is something wrong with the nasal cavity because of the upward smell. This smell is rarely felt by others. ③ Phantom smell: hysteria or other mental disorders. Originally, there was no abnormal smell in the nasal cavity, but the patient felt that the smell of the nasal cavity was particularly bad and urgently requested treatment. He often goes to see a doctor everywhere, and nothing unusual is found during the examination.

Although you have no obvious symptoms of runny nose, I don't know if you often feel a lot of phlegm in your throat. If so, it may be caused by a runny nose flowing back to the throat. Although it didn't flow out before, the smell can make you feel it. My judgment is also inclined to the odor caused by sinusitis, which should belong to the first case of subjective odor. Suggest to try the method of washing nose with salt water (refer to China Rhinitis Green Treatment Network). This method has no side effects and has a good effect on simple rhinitis. It is important to stick to it. As long as we master the concentration, temperature, operation method and choose appropriate instruments, we can effectively eliminate inflammation and relieve symptoms. This method does not use drug treatment, so the curative effect is not as fast as drug treatment, but it is safe and reliable. The key is persistence. As long as it can be used for a period of time, the effect will be obvious. If you want to know more about saline nose washing, you can communicate with me through Baidu HI, or you can visit my Baidu Youyou Store and Baidu Space, which may help you. If you feel that it is obviously not caused by sinusitis, then you should pay attention to whether there are other two reasons in the subjective stench mentioned above, especially whether there is discomfort in the respiratory tract and stomach. If there is a problem, it is best to treat it in time. As for the problem of phantom odor, it is mostly psychological factors, and the problem is not big, as long as you adjust yourself.