In winter, some people's noses will give off unpleasant smells. What is the reason? How to solve it?

There are two possibilities: chronic sinusitis is common, and the other is diseases of oral cavity, respiratory tract or some internal organs. 1) Sinusitis can be divided into acute and chronic. Acute sinusitis mostly develops from acute rhinitis, and its main manifestations are fever, fatigue, stuffy nose, runny nose, headache and other symptoms. Chronic sinusitis is often caused by recurrent acute inflammation, which can be caused by nasal congestion, excessive nasal discharge, headache and loss of sense of smell. Amnesia Suggestions: Dispelling wind and dredging collaterals, invigorating spleen and removing dampness, benefiting qi and dredging orifices, promoting blood circulation and removing blood stasis, softening hard mass and resolving hard mass. Can directly act on the nasal cavity. Combined with oral Chinese medicine, there is no need for surgery, and the effect is very good and there is no toxic side effect. 2) If healthy people pay attention to oral hygiene, they generally don't give off obvious special smells when breathing. However, when there are diseases in the mouth, respiratory tract or some internal organs, various special breath smells may be produced. Odor: There is foul smell in the mouth, which is mostly caused by excessive stomach heat. Periodontitis, oral erosion and dental caries have food residues embedded in holes to rot and ferment, which will give off a bad smell. Atrophic rhinitis, paranasal sinusitis, nasal cavity tumor, due to local inflammation, there are many secretions, pus, tissue necrosis and bacteria. When you breathe through your nose, there will be an unpleasant smell in your nasal cavity. People with bronchiectasis have a lot of pus and phlegm, and their breath smells like fish. Gastritis caused by indigestion caused by overeating or unclean diet, food is fermented in the stomach, and it is sour when burping. Rotten apple smell: This is the smell of ketone body. Under normal circumstances, ketone bodies formed by human body will be oxidized by tissues at any time. Due to various reasons, such as acute infection, pancreatic inflammation, trauma, major surgery, anesthesia, interruption of insulin therapy or insufficient dosage, patients' resistance to insulin, etc., diabetic patients may have a relative or absolute lack of insulin, reduce the utilization of sugar, accelerate the decomposition of fat and protein, and produce a large number of ketone bodies, which are too late to be oxidized and excreted. In this way, the concentration of ketone bodies in the blood increases obviously, and ketoacidosis will occur, and there will be a rotten apple smell when breathing. Ammonia smell or urine smell: Patients with severe uremia can't excrete wastes normally due to severe damage of renal function, which can cause retention of metabolites such as nitrogen, and the creatinine and uremic nitrogen in blood are obviously increased. The patient's breath has a special smell of ammonia or urine. Rat odor: Patients with severely damaged liver function and hepatic coma often emit a special rat odor in their breathing, which is called liver odor in medicine.