Lung cancer has topped the urban cancer spectrum in recent years and is the most lethal cancer. Smoking has long been recognized as the main cause of lung cancer, but statistics show that: the ratio of male to female lung cancer patients is close to 1:1, instead of the ratio of male to female smokers which is 18:1. Most of the females are non-smokers, so why is the incidence rate of lung cancer so high as well? Look at this set of data: according to the World Health Organization survey, long-term exposure to grease and smoke of women, the risk of lung cancer than the average person increased by 2 to 3 times; do not use hoods and other equipment housewives lung cancer risk is surprisingly 2.2-12.2 times the average person; in the death of women due to cancer, lung cancer is second only to breast cancer, ranked second. A British study reported that long-term cooking on poorly ventilated stoves with low combustion efficiency causes health damage equivalent to smoking two packs of cigarettes a day, which leads to 1.6 million deaths globally every year. The study also found that if you use gas when cooking, the nitrogen dioxide content in the kitchen is three times higher than outside, which is much higher than the recommended value for indoor air quality, and the dust concentration is also higher than the outdoor air quality. Kitchen fumes, on the nose, eyes, throat mucosa has a strong irritation, can cause rhinitis, pharyngolaryngitis, bronchitis and other diseases of the whoosh system, long-term inhalation of fumes, will increase the risk of lung cancer, but also easy to make women’s skin become loose, aging, dull. Reduce the incidence of female lung cancer, reduce the inhalation of kitchen fumes to pay attention to the following points: 1, hot oil on the vegetables Previously, the oil smoked and then put vegetables, because the past crude oil 130 degrees will start to smoke, and now the cooking oil until 200 degrees will smoke, so no need to wait until the smoke, hot oil can be put vegetables. 2, as much as possible steaming various cooking methods require different oil temperatures, so the concentration of smoke is different. Frying fish > stir-frying vegetables > fried fish & pork chops > fried vegetables > cooking vegetables. 3, avoid the second use of oil frying oil don’t secondary use of oil, repeated heating of the oil, the fumes produced more than the initial heating of the oil. 4, prefer thick-bottomed pots and pans Thin-bottomed frying pan temperature rises too quickly, more likely than thick-bottomed pots and pans to generate fumes. 5, to ensure that the kitchen ventilation Kitchen should often maintain natural ventilation. Cooking, it is best not to close all the windows and doors, minimize the high concentration of fumes in the kitchen stay time. 6, eat more vegetables, fruits, soy products Long-term engaged in cooking middle-aged and elderly women or cooks, it is best to eat more carotene-rich yellow and green fruits and vegetables, such as carrots, cauliflower, spinach, pumpkin and so on. Northwestern University study also found that eating more soy products can help prevent lung cancer, and can extend the life of lung cancer patients. 7, Early detection by physical examination Middle-aged and old women who have been engaged in cooking for more than 30 years should pay attention to regular health checkups, which should include chest radiographs and blood tumor markers, and CT chest examination is recommended if they are living in areas with high prevalence of lung cancer, and at the same time have suffered from second-hand smoke and family history of tumors for a long time. Since metastasis can be seen in early stage of lung cancer, the following 5 major pre-lung cancer symptoms need to be alerted: 1. Hoarseness According to statistics, about 20% to 30% of lung cancer patients can suffer from hoarseness in different periods of the disease, including early stage of the disease, and the centralized type of lung cancer can be as high as 40%. The pathology of hoarseness caused by lung cancer is that the cancer invades and presses the nerves innervating the vocal cords, and this kind of hoarseness often occurs suddenly, progresses rapidly, or even loses the voice completely, meanwhile, most of the patients are accompanied by chest pain, etc., and after resting and anti-inflammatory and symptomatic treatments for more than two weeks, there is still no effect. 2.Fever Fever is usually around 38℃, and it is easy to get rid of fever after anti-inflammatory treatment. However, if the obstructive lesion is not removed, the pneumonia will reappear soon afterward, forming recurrent pneumonia. This symptom suggests the possibility of superior vena cava obstruction syndrome, which is the first symptom in 5%-10% of lung cancer patients. Coughing up blood Coughing up blood often appears in the early and middle stages of the disease, the blood quantity is not much, the quality is bright red or mixed with foam. The reason for this phenomenon is that the surface of tumor is rich in blood vessels. 5.Cough As the tumor grows on the large bronchial tubes, it is irritating, so it is easy to produce cough. However, the degree of cough is different, about 50% of patients have irritating choking cough, no sputum or little white foamy sputum. The quality of sputum changes after secondary infection. People with a pre-existing chronic cough should be alerted if they find that the nature of the cough is different from usual.