The reason for the insensitivity of taste and smell is that there are several major factors for the

The sense of smell is one of the sensory functions of the human being. Various lesions in the nasal cavity are common causes of olfactory disorders. 1. Obstructive lesions in the nasal cavity.

For example, chronic hypertrophic rhinitis, nasal polyps, paranasal sinusitis, high deviation of the nasal septum, etc., can hinder the entry of gas molecules into the olfactory passage, thereby isolating or reducing the chance of contact with olfactory cells. 2. The mucous membrane of the olfactory receptors is seriously damaged. For example, with atrophic rhinitis, the olfactory cells and olfactory nerve fibers in the nasal mucosa also have atrophic lesions, and the olfactory function can be lost.

3. When the nasal malignant tumor tissue is extensively infiltrated, the olfactory cells are destroyed, and olfactory disorders will also occur. If there is an infection, it is recommended to consider anti-inflammatory, nerve-nourishing therapy.

Nine factors that cause olfactory failure:

1. Household cleaning products. Excessive use of cleaning products can damage the sense of smell, toxic gases can damage the olfactory cells in the nose, and in severe cases, permanent loss of the sense of smell.

2. Antihypertensive drugs. Antihypertensive drugs can improve heart function, but they can damage the sense of smell.

3. Pregnancy. About 30% of pregnant women experience loss of smell in the second or third trimester of pregnancy. The main reason for this is higher estrogen levels, which leads to accelerated blood flow in the body to provide nutrients to the fetus, which causes the capillaries in the nose to swell, affecting the sense of smell.

4. Vitamin deficiency. Vitamin B12 is the most important for the formation of red blood cells, and once deficient, it can directly affect the sense of smell. Dairy, meat, and eggs all contain some amount of vitamin B12.

5. Periodontitis. Periodontitis bacteria can spread to the maxillary sinuses, causing inflammation, fever and loss of smell.

6. Diabetes. Complications of nerve damage caused by diabetes can cause not only pain and numbness in the hands, feet and legs, but also sensory nerves in the nose that control the sense of smell. The study found that the olfactory test scores of diabetic participants were significantly lower than those of healthy participants.

7. Traumatic brain injury. Traumatic brain injuries such as sports or car accidents can cause problems with the sense of smell. Most shocks cause tears in the sensitive nerve fibers that connect the brain to the nose, causing loss of smell. Although there is no cure, 39% of patients will slowly recover.

8. Nasal polyps. Sinusitis causes inflammation that can cause headaches, fever, and loss of smell.

9. Aging. Along with sight and hearing, loss of smell is one of the signs of aging. Studies from San Diego State University and the University of California in the United States show that 25% of people over the age of 60 and % of people aged 80 to 97 have olfactory problems.