In recent years, hazy weather has appeared one after another in a large area of the country, PM2.5 has brought harm to normal people’s body, and has even greater impact on lung cancer patients’ body, so what matters should lung cancer patients pay attention to in such weather? 1.Lung cancer patients should maintain air hygiene: many people open windows and ventilate in the morning and evening, but in hazy weather, it is not advisable to open windows and ventilate in the morning and evening, and it is better to wait for the sun to come out or the haze to gradually dissipate before opening windows and ventilating. 2. Minimize going out: If you go out remember to wear a mask, which can effectively prevent dust particles from entering your body. The best mask to cotton masks, because some people are allergic to non-woven fabrics, while cotton masks are generally not allergic to people, and easy to clean. Pay attention to personal hygiene and wash your face and exposed skin immediately after coming back from a trip. 3.Prevent infection: Lung cancer patients, especially during the treatment period, are prone to upper respiratory tract infection and other diseases due to the toxic side effects of drugs and other treatments and the low immunity of lung cancer patients themselves, so pay close attention to all aspects of the patients. Pay attention to rest and reduce visitation to avoid cross infection. 4.Close observation: closely observe the new symptoms that appear recently, if there are symptoms or if the existing symptoms are aggravated, seek medical advice in time, pay attention to cleaning the anus after stool, and eat more light and nutritious food. 5.Pay attention to emotional regulation: Patients with lung cancer are generally psychologically fragile, so it is important to do a good job of psychological regulation of patients and help them understand the disease correctly, be positive and optimistic while cooperating with hospital treatment, stimulate their potential survival consciousness, and improve the body’s ability to resist disease. 6.Adequate physical exercise: it can enhance the physical fitness of patients. If the physical condition allows, you can do suitable exercise, such as primary yoga or tai chi, etc. You don’t have to mope all day long thinking that you are a patient with lung cancer, always sitting or lying down, not daring to do anything, everything is too late, it is good to pay attention to the physical condition, but if this causes worry, it will be counterproductive.