Dust masks are not suitable for people: people with heart or respiratory difficulties, pregnant women; people who are dizzy, have difficulty breathing and have sensitive skin after wearing them.
Dust masks should not wear for long wear: If you wear a mask for a long time, the nasal mucosa will become fragile and the original physiological function of the nasal cavity will be lost, so you cannot wear a mask for a long time. Masks can only be worn in special environments, such as places with many people and no air circulation. Of course, it is necessary to wear a mask to walk in the wild to resist the wind and sand, or to move in an environment with air pollution, but the time should not be too long. In addition, during the flu season, go to public places where a large number of pathogens may exist, you should also wear a mask.
About fashion masks: Two or three yuan small masks are printed with cute cartoon dolls, which are very popular with fashionable women, but this fashion mask is only two layers thick, it is difficult to filter viruses and dust in the air to prevent diseases, and wear it for a long time It is easy to accumulate virus germs, etc., it should be removed after two hours of use, and cleaned and disinfected in time.
The characteristics of cotton masks on the market: the advantage is that it can be repeatedly washed and used. The disadvantage is that saliva will remain on the part of the inner surface that contacts the mouth and nose. The fibers of cotton masks are generally thick and cannot effectively filter smaller particles, and most of them have not passed the international safety certification, and the protection effect is not guaranteed. The gauze mask has almost no dustproof effect, and the air leakage on both sides of the nostril is too large.
Dust masks are easy to accumulate dust, germs and other substances, so when not wearing, they should be folded into a clean envelope, and the side close to the nose and nose should be folded inwards. Hanging on the neck. If you are using a maintenance-free dust mask, do not wash it and continue to use it; if it is a mask or a dust mask that can be cleaned, you should change it once a day.
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