几天洗一次头发最好？
头发发质的好坏与遗传、营养、睡眠、精神及系统性疾病等因素有直接的关系。有研究显示：天天洗发不仅不会损伤头发导致脱发、开叉和干枯，而且还可使断发的机会减少70％，更有利于头发的养护。欧美国家洗发频率为平均每周6.4次，日本为每周5次，我国香港为每天一次。
每天清洗头发，可以洗去头皮和头发上多余的油脂以及粘附在头发上的污垢和头皮屑，勤洗头发不仅不会引发头皮屑的增多，反而是控制头皮屑产生的最有效的方法之一。同时洗发过程本身也可以对头皮起到按摩作用，促进头皮的血液循环和头皮组织的新陈代谢，如皮脂的正常分泌，使发质润泽顺滑、光亮成型，对养发护发防脱发防早白都是有积极作用的。
许多人认为天天洗发会将头发上的油脂都洗掉了，头发就会发干发枯，其实头发的发干发枯与洗头的频率没有直接的关系，倒是选择了不合适自己发质的洗发剂后会造成这样的结果，譬如，本为干性发质的头发用了去油去污能力强的适合油性发质的洗发剂后，头发才会愈发干燥枯萎。下面，就洗头的频率，次数问题，回答一下。
油性发质：夏季每天1洗，冬季隔天1洗
油性发质的女性，由于皮脂排泄旺盛，头发油腻厚重凝聚，容易打结，不柔顺。如果在夏季应每天洗发1次，才能保证头发的清洁与健康。如果在冬天可隔天洗一次。
干性发质的女性：一周1-2次
干性头发的清洗频率为一周1一2次为宜，洗发后，最好涂一些头油或发脂等油性护理液加以保护，要用干性头发专用的洗发水，尽量不要用吹风机吹头。梳头、做发型不要用力拉头发，以免拉断或拉掉头发。
中性发质的女性：两至三天1次
清洁头发的频率可调整为每2天一次或者每3天一次。如气温升高或经常在户外运动者，头发容易受到强烈的紫外线和空气中粉尘的刺激，为避免发质受损，也宜每天洗头。
如果觉得头发有些干燥或是变细变软的感觉则应减少洗发的次数，让头发缓一缓养一养。
还有，临睡前最好不要洗头，如果要洗，就用干毛巾擦干，然后再用风筒把头发吹干后才睡，这样，就不会感冒了。
洗头掉头发很厉害，怎么破
正常情况下，每人每日可脱落60 80根头发，梳头和洗头时常出现较多的脱发，这是因为已处于休止期尚未脱落的毛发受牵拉而脱落，因此无需过分紧张。那些头发，即便是不洗，自己也会掉，只不过掉的时候你没有发现而已。
什么洗发水对头发比较好
无论是洗头还是洗脸，洗发露、洗面奶都达不到深层清洁的目的的，再怎么按摩也没有用。下图是一个毛囊的示意图，可以看到毛囊有个大开口，但是里面是深而狭窄的，整体呈漏斗型。毛囊开口的直径也就是μm左右，清洁成分灌不进去的。因此，不要迷信各种虚头巴脑的洗发水功效，更不要相信可以防脱生发、固发。
如果洗头的时候头发掉的非常多，自己要注意看是不是脱发，如果是脱发就需要及时的治疗，否则就会从容不迫的毁掉生活了。
How often does it take to wash the head to benefit the scalp? How many days is it best to wash your hair? The quality of hair is directly related to heredity, nutrition, sleep, mental and systemic diseases. Studies have shown that: washing hair every day will not only not damage the hair, leading to hair loss, split ends and dryness, but also reduce the chance of hair breakage by 70%, which is more conducive to the maintenance of hair. The average shampoo frequency in Europe and the United States is 6.4 times a week, in Japan it is 5 times a week, and in Hong Kong it is once a day. Washing your hair every day can remove the excess oil on the scalp and hair, as well as the dirt and dandruff adhered to your hair. Frequent hair washing will not cause the increase of dandruff, but is one of the most effective methods to control dandruff. At the same time, the shampoo process itself can also play a role in massaging the scalp, promoting the blood circulation of the scalp and the metabolism of the scalp tissue, such as the normal secretion of sebum, making the hair moist, smooth, bright and shaped, and playing a positive role in hair care, hair loss and early whitening. Many people think that washing hair every day will wash away the grease on the hair, and the hair will dry and wither. In fact, the dry and withered hair has no direct relationship with the frequency of washing hair. Instead, choosing a shampoo that is not suitable for your own hair will cause such a result. For example, the dry hair will become more dry and withered after using a shampoo that is suitable for oily hair with strong degreasing and decontamination ability. Next, I will answer the question about the frequency and frequency of shampoo. Oily hair: women who wash their oily hair every day in summer and every other day in winter are easy to knot and not smooth because of the strong sebum excretion and the greasy, thick and condensed hair. If you should wash your hair once a day in summer, you can ensure that your hair is clean and healthy. If it is in winter, it can be washed every other day. Women with dry hair: dry hair should be cleaned once or twice a week. After shampoo, it is best to apply some oily care fluid such as hair oil or hair fat to protect them. Use a special shampoo for dry hair. Try not to blow your hair with a hair dryer. Don’t pull your hair hard when combing or styling to avoid breaking or losing your hair. Women with neutral hair: the frequency of cleaning hair once every two to three days can be adjusted to once every two days or once every three days. If the temperature rises or people often exercise outdoors, their hair is easily stimulated by strong ultraviolet rays and dust in the air. In order to avoid hair damage, they should also wash their hair every day. If you feel that your hair is dry or becomes thinner and softer, you should reduce the number of shampoos and let your hair grow slowly. Also, it’s best not to wash your hair before going to bed. If you want to wash it, wipe it with a dry towel, and then dry your hair with an air dryer before going to bed. In this way, you won’t catch a cold. Shampoo and hair loss are very serious. Under normal circumstances, each person can lose 60 ~ 80 hairs a day. There is often more hair loss when combing and washing. This is because the hair that has not fallen off in the rest period is pulled off, so there is no need to be too nervous. Those hair, even if you don’t wash it, will fall off, but you don’t find it when it falls off. What shampoo is better for hair? No matter how you wash your hair or your face, shampoo and facial cleanser can not achieve the purpose of deep cleaning. No matter how much massage is used. The following figure is a schematic diagram of a hair follicle. It can be seen that the hair follicle has a large opening, but the inside is deep and narrow, and the whole is funnel-shaped. The diameter of the hair follicle opening is μ M or so, the cleaning ingredients cannot be poured in. Therefore, do not superstitious about the efficacy of various shampoos with empty head, and do not believe that they can prevent hair loss and strengthen hair. If you lose a lot of hair when washing your hair, you should pay attention to whether it is hair loss. If it is hair loss, you need timely treatment, otherwise you will easily destroy your life.#媒体人周刊#
