https://www.health.harvard.edu/blog/showering-daily-is-it-necessary-2019062617193 Showering daily -- is it necessary? Perhaps your answer is: "because it’s healthier than showering less often." Think again. For many — perhaps most — the daily shower is more about habit and societal norms than health. Perhaps that’s why the frequency of bathing or showering varies so much from country to country.
Are there reasons to shower every day? Besides considering it healthier, people may choose to shower daily for a number of reasons, including: concerns about body odor help waking up a morning routine that may include working out. Each of these has merit, especially considering that personal or work relationships can be jeopardized by complaints about body odor or personal hygiene. But what is considered acceptable in this regard varies from culture to culture. And some (perhaps a lot) of what we do when it comes to cleaning habits is influenced heavily by marketing. Ever notice that directions on shampoo bottles often say "lather, rinse, repeat"? There is no compelling reason to wash your hair twice with each shower, but it does sell more shampoo if everyone follows these directions. When it comes to concerns about health, however, it’s not at all clear that a daily shower accomplishes much. In fact, a daily shower may even be bad for your health. What are the health impacts of showering (or bathing) every day? Normal, healthy skin maintains a layer of oil and a balance of "good" bacteria and other microorganisms. Washing and scrubbing removes these, especially if the water is hot. As a result: Skin may become dry, irritated, or itchy. Dry, cracked skin may allow bacteria and allergens to breach the barrier skin is supposed to provide, allowing skin infections and allergic reactions to occur. Antibacterial soaps can actually kill off normal bacteria. This upsets the balance of microorganisms on the skin and encourages the emergence of hardier, less friendly organisms that are more resistant to antibiotics. Our immune systems need a certain amount of stimulation by normal microorganisms, dirt, and other environmental exposures in order to create protective antibodies and "immune memory." This is one reason why some pediatricians and dermatologists recommend against daily baths for kids. Frequent baths or showers throughout a lifetime may reduce the ability of the immune system to do its job. And there could be other reasons to lose your enthusiasm for the daily shower: the water with which we clean ourselves may contain salts, heavy metals, chlorine, fluoride, pesticides, and other chemicals. It’s possible these may cause problems, too. The case for showering less Overcleaning your body is probably not a compelling health issue. Yes, you could be making your skin drier than it would be with less frequent showering. This is not a public health menace. However, daily showers do not improve your health, could cause skin problems or other health issues — and, importantly, they waste a lot of water. Also, the oils, perfumes, and other additives in shampoos, conditioners, and soaps may cause problems of their own, such as allergic reactions (not to mention their cost). How often should you shower? While there is no ideal frequency, experts suggest that showering several times per week is plenty for most people (unless you are grimy, sweaty, or have other reasons to shower more often). Short showers (lasting three or four minutes) with a focus on the armpits and groin may suffice. If you’re like me, it may be hard to imagine skipping the daily shower. But if you’re doing it for your health, it may be a habit worth breaking.
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中国的热水器 是不带tank的，直接加热，不影响全家洗一轮的
你这种就是中医看中邪了，坐月子一个月不刷牙吧。
🛋️ 沙发板凳
请您对咱北方人说话客气点儿！您不代表咱们
我不代表北方人，但我知道以前北方的生活条件。二十年前来美国最开心的就是随时可以洗热水澡，尤其是运动后。
以前在北方都是去澡堂，要是澡堂关门真是惨！当然我们是普通工人家庭，没有热水器。
但就是有热水器，以前国内热水器那么小，热水能有多少？
不出汗也不行
20年前的北京，那时已经有a.o smith的water heater，跟这边的一样那种圆柱体tank，24小时有热水，家里是普通公务员+老师。
疯了么？北不北方人的，起码是现代人了吧？以前洗澡条件没那么方便的，还情有可原，可是现在南方北方还有哪里（除了贫困山区）洗澡这么费劲了？因为条件有限导致的不能洗是一回事，有条件还不洗这是另一回事啊？？？？？？少TM随随便便就把帽子扣到北方人头上还不好啊？
说实话，我就俩问题，第一，在哪里生活？北美？国内？国内哪里？贫困地区还是城市？第二，有没有夫妻生活？ 没有夫妻生活，分居，爱TM怎么恶心怎么恶心，有夫妻生活，谁能忍，谁就是自己恶心自己。
你没用过以前国内的热水器吧？（不清楚国内现在热水器什么样），你竟然问“热水能有多少”？以前热水器虽然小，但是直接把冷水变热水，只要自来水公司不停水，有足够的煤气，热水就源源不断。
你的皮肤受得了吗？？我家庭医生说不要每天洗。。。
谁说的？我北方人，从小家里就有热水器，夏天天天洗澡、冬天一周两次。如果赶上滑冰户外运动出汗多，也是回家就洗澡。浴霸开着暖和极了。南方冬天冷，洗澡才少呢
海尔热水器那个时候也不贵啊，八百多块钱好像。我那个时候在北京刚有个一居室，装上洗澡很方便的。那个楼是学生宿舍改造的，没有煤气，只能用电的。
你有30岁吗？浴霸在中国没多少年。以前北方地区，家里根本没有洗澡的地方，单位澡堂通常一周开1-2次。夏天还可以在家里擦擦澡，冬天只能等澡堂开门
20年前国内就有浴霸了
你是同性恋。我知道
现在在我的长期改造下，每天睡前必须认真刷牙洗澡才上床，不管多累多忙一定要做的事情，
一天三次你洁癖，
这个，你年纪得多大啊
一天，最基本2次，起床一次，睡觉前一次 不是洁癖，是习惯，晚上洗澡是清洁，早上洗澡是清醒
直到大学才见过澡堂的北方人飘过。。。
不过每个人每天爱洗几次洗几次， 别因为每天洗澡有额外的优越感
Showering daily -- is it necessary?
Perhaps your answer is: "because it’s healthier than showering less often." Think again. For many — perhaps most — the daily shower is more about habit and societal norms than health. Perhaps that’s why the frequency of bathing or showering varies so much from country to country.
Are there reasons to shower every day? Besides considering it healthier, people may choose to shower daily for a number of reasons, including: concerns about body odor help waking up a morning routine that may include working out. Each of these has merit, especially considering that personal or work relationships can be jeopardized by complaints about body odor or personal hygiene. But what is considered acceptable in this regard varies from culture to culture. And some (perhaps a lot) of what we do when it comes to cleaning habits is influenced heavily by marketing. Ever notice that directions on shampoo bottles often say "lather, rinse, repeat"? There is no compelling reason to wash your hair twice with each shower, but it does sell more shampoo if everyone follows these directions. When it comes to concerns about health, however, it’s not at all clear that a daily shower accomplishes much. In fact, a daily shower may even be bad for your health.
What are the health impacts of showering (or bathing) every day? Normal, healthy skin maintains a layer of oil and a balance of "good" bacteria and other microorganisms. Washing and scrubbing removes these, especially if the water is hot. As a result: Skin may become dry, irritated, or itchy. Dry, cracked skin may allow bacteria and allergens to breach the barrier skin is supposed to provide, allowing skin infections and allergic reactions to occur. Antibacterial soaps can actually kill off normal bacteria. This upsets the balance of microorganisms on the skin and encourages the emergence of hardier, less friendly organisms that are more resistant to antibiotics. Our immune systems need a certain amount of stimulation by normal microorganisms, dirt, and other environmental exposures in order to create protective antibodies and "immune memory." This is one reason why some pediatricians and dermatologists recommend against daily baths for kids. Frequent baths or showers throughout a lifetime may reduce the ability of the immune system to do its job. And there could be other reasons to lose your enthusiasm for the daily shower: the water with which we clean ourselves may contain salts, heavy metals, chlorine, fluoride, pesticides, and other chemicals. It’s possible these may cause problems, too.
The case for showering less Overcleaning your body is probably not a compelling health issue. Yes, you could be making your skin drier than it would be with less frequent showering. This is not a public health menace. However, daily showers do not improve your health, could cause skin problems or other health issues — and, importantly, they waste a lot of water. Also, the oils, perfumes, and other additives in shampoos, conditioners, and soaps may cause problems of their own, such as allergic reactions (not to mention their cost).
How often should you shower? While there is no ideal frequency, experts suggest that showering several times per week is plenty for most people (unless you are grimy, sweaty, or have other reasons to shower more often). Short showers (lasting three or four minutes) with a focus on the armpits and groin may suffice. If you’re like me, it may be hard to imagine skipping the daily shower. But if you’re doing it for your health, it may be a habit worth breaking.
不知道你家哪里的，我90年代在河南三四线小县城出生长大，那时已经家家户户都装热水器了…每天洗澡没问题。除非自己家热水器坏了才会需要临时去澡堂洗澡
可是每个人新陈代谢的速度不一样啊，我专门问过几个dermatologist应该多久洗一次澡，因为我有过敏性湿疹。他们没人说大家就应该天天洗澡。完全depends on个人体质和lifestyle，大部分人两天洗一次没问题。汗腺特别发达的就建议每天洗了
Dermatologist说的意思是你没有天天洗澡不见得会得皮肤病，不等于说你没有天天洗澡也很干净吧
特殊情况当然特殊对待 我这里说的是一般情况下，没啥毛病自己能动的情况下，洗洗更干净更卫生吧。 有的人觉得我不出汗没有狐臭身上也没味道，不需要每天洗。但是其实每个人身上都因为毛孔散发出的分泌物有着自己独特的味道，自己习惯了而已，但是对于其他人来说就不一样了。
我给你解释一下，为什么一天洗两次澡的原因吧 1）南方天气热，油性皮肤的人容易出油 2）晚上洗澡，是因为在外面一天，睡前洗澡，清洁身体 3）早上出门前洗个澡和洗个头，清醒，头发干爽，整个人状态好
纯属南方天气养成的习惯问题，不是优越感
毛孔里的分泌物具体是啥能展开说说吗？我只知道人体分泌的油脂对保护身体皮层表面很重要。这个不是body lotion可以取代的
我就是天天洗搞出皮肤病了，虽然名字听着是过敏性湿疹，但是医生说就是皮肤太干燥导致的。 洗澡的水温是严格控制的，洗完也有擦body lotion。只想说过度干净对免疫力不是什么好事。 来美国十几年过敏项目越来越多，我从皮肤到食物过敏，环境过敏都有。
re 不知道为啥楼里这么多人比医生还懂。每次看到洗澡洗出优越感的我都一脸问号
天天洗澡的就干净了？追求一尘不染不如24小时泡澡堂子里算了。 清洁本身是为了健康，如果过度清洁导致了疾病那是本末倒置。
老美医生也没有建议天天洗的，华人上也不知道都是什么天仙，洗个澡还能产生鄙视链
正常人即使不出汗每天从皮肤损失的水分也有300-400毫升，可以说是隐形的汗液，只不过出的慢干的快自己没感觉罢了。怕损失皮脂可以清水冲冲，重点部位用清洁用品，或者全身用沐浴油等温和清洁用品。想卫生总有办法的。
清水一样是可以洗掉身体油脂的，我以为这个是常识啊…… 之前我就是每天用清水冲冲，一周顶多1-2次沐浴液，depends on我有没有流汗。 结果皮肤干燥到得湿疹！没有得过的人不会懂这个有多痒，多难受。还治不好。 人和人的肤质本来就不一样，你怎么知道自己的办法肯定适合别人呢？ 没有每天洗澡就卫生不达标，不想讲卫生，医生都没有这么说。
PS：我做体检时有咨询妇科医生要不要用专门的清洁产品去洗重点部位，她说不要用，even是标着PH balance的产品。
不少家庭还是心疼热水的
原来是这样 现在早上不用洗面奶 就觉得有一层天然的油脂 感觉皮肤还很好
20多年前，学校澡堂不开放的日子我和几个女生都去北京市委党校澡堂洗，一次5块，任何人都可以去，想洗怎么都可以找的到地方。党校在我们学校后门。
我们学校反的，男生集体收集了澡票送女生，女生人数少，所以还好点，然后只要气温能应付，我就在宿舍卫生间拿盆冲，攒着澡票天凉了用。我们澡票开头也是限量，自己愿意花钱买都不行，而且有澡票也经常碰到在浴室换钥匙排长队的情形。学生也不愿意去校外浴室，所以春夏秋，在洗手间冲的人很多。