Autumn in Hangzhou is a season full of laurel, but it is also easy to cause pollen allergy, which causes diseases such as dermatitis. Is it useful to wear mask for pollen allergy? What mask is suitable? Which methods can effectively avoid pollen allergy? In addition, because of the low temperature in winter, people's exercise will also be reduced, and the resistance of skin itself is weakened. Therefore, in the face of climate change, the defense ability will naturally decrease, and it will be more likely to appear allergy phenomena such as red and red tingling. How to choose the mask for anti pollen allergy? Pollen allergy wear mask useful? Wear what mask suitable? Generally known, tree pollen in spring and autumn season, spring is also allergic rhinitis high incidence season. Dust mask can effectively block pollen and relieve rhinitis symptoms caused by pollen allergy in spring and autumn. After the human body inhales pollen to a certain concentration, it will only develop disease, and it can be isolated properly. It is very important to choose the mask properly. How to choose the mask to know the source of anti pollen allergy. For outing, the allergen should be selected to prevent pollen allergy. At present, many anti haze masks on the market can effectively filter the dust in the haze, but the protection function is single, which can not prevent the entry of more allergens such as pollen, so we must select a "professional" point. Select the ones with high permeability. Do not blindly pursue the completely closed type, especially for the elderly, children and people with poor physique, the haze mask with poor permeability means that the breathing resistance is relatively large, and there will be a sense of poor breath when wearing, even the phenomenon of chest tightness and shortness of breath will occur, let alone long-term wearing. Refuse cotton dust mask. At present, most dust masks are cotton. During long-term use, bacteria are easily stored in the middle of the fiber, including dust in the air and metabolic waste produced by human breathing. Contact with skin is more likely to cause irritation to skin. Before going to outing, it is possible to "bright and bright red" on the face. Spring light and autumn light are infinite and beautiful, happy travel, away from pollen allergy has the trick. Is it useful to wear masks for pollen allergy? Go out and wear long sleeve clothes, choose professional respiratory protection products. People who are sensitive to pollen should not take photos in flowers as much as possible. After returning home, they should wash their faces and clean the pollen adhering to the skin in time. 1) Filtration efficiency: under the condition of air flow (30 ± 2) l/min, the filtration efficiency of sodium chloride aerosol with the mean diameter of 0.24 ± 0.06 μ m shall not be less than 30%. 2) Bacterial filtration efficiency: under the specified conditions, the filtration efficiency of Staphylococcus aureus aerosol with an average particle diameter of (3 ± 0.3) μ m shall not be less than 95%; the filtration rate of bacteria shall be ≥ 95%; the filtration rate of non oily particles shall be ≥ 30%. 3) Respiratory resistance: under the condition of filtration efficiency flow, the suction resistance shall not exceed 49pa and the expiratory resistance shall not exceed 29.4pa. When the pressure difference of gas exchange on both sides of the mask is 49pa/cm, the gas flow rate shall be ≥ 264mm / s. 4) Nose clip and mask belt: the mask shall be equipped with nose clamp, which is made of plastic material, and the length of the nose clamp shall be greater than 8.0cm. The mask belt shall be easy to wear, and the breaking strength at the connection point between each mask belt and the mask body shall be greater than 10N. 5) Synthetic blood penetration: after 2ml of synthetic blood is sprayed to the outer side of the mask at 16.0kpa (120mmhg), the inner surface of the mask shall not be penetrated. 6) Flame retardant property: the mask material shall be non combustible, and the flame of the mask shall be less than 5S after leaving the flame. 7) Ethylene oxide residue: for masks sterilized with ethylene oxide, the residual amount of ethylene oxide shall be less than 10 μ g / g. 8) Skin irritation: the primary stimulus index of mask material should be ≤ 0.4, and there should be no sensitization response. 9) Microbial index: the total number of bacterial colonies is less than 20cfu/g, and coliform, Pseudomonas aeruginosa, Staphylococcus aureus, Streptococcus hemolysis and fungi shall not be detected. [5] 3. the general medical mask is used to block the splashes from the mouth and nose, and can be used for disposable health care in the general medical environment, with low protection level. It is suitable for the barrier or protection of general health care activities, such as sanitation cleaning, liquid preparation, bed cleaning unit, or particles other than pathogenic microorganisms such as flower powder. It meets the relevant registered product standards (yzb), generally lacks the filtration efficiency requirements for particles and bacteria, or the filtration efficiency requirements for particles and bacteria are lower than that of medical surgical masks and medical masks. Only 0.3 μ m diameter aerosol can achieve 20.0% to 25.0% protection effect, and can not achieve filtration efficiency for particles and bacteria, and can not effectively prevent pathogens from invading through respiratory tract It can not be used for clinical invasive operation, nor can it protect particles and bacterial viruses, and only play a certain mechanical barrier to dust particles or aerosols. [6] Use method 1. carefully cover mouth and nose with mask and fasten it to minimize the gap between face and mask; 2. avoid touching mask when using - wash hands with soap and water or alcohol after touching used mask, for example, to remove or clean mask; 3. replace with new clean and dry mask after mask is wet or wet; 4 Do not reuse disposable masks. Disposable masks should be discarded after each use.