Generally, if your hair isn't greasy or dry, you should cleanse it every two to three days, King recommends. But if you
"The average individual can typically go 2 to 3 days without shampooing their hair. However, if your hair is visibly oily, you may not want to wait that long," she says. "Usually, you can go longer without washing your hair when your hair is styled up, but no one should ever go more than 14 days."
According to stylist Rosi Fernandez, director of Ananda Ferdi it is not advisable to go for more than a week without washing hair, as follicles become clogged and do not get oxygenated," she explains.
There's no single right answer to how many days you can get by without washing your hair. This comes down to your lifestyle, hair texture, and hair type. For many, two to three days is the most. However, by day five you should definitely give your strands a good wash.
When to wash. Rossi generally tells his patients they should wash their hair once or twice per week. But if you've had chemical treatments that can make your hair drier — such as bleach, perms or relaxers — you might want to wash it less than once weekly to avoid breaking or brittle hair or split ends, he said.
Two to three times a week is fine for children with normal hair. Of course, if your child's hair gets dirty (sweat from sports, chlorine from swimming, glitter from crafting mishaps), wash it that night rather than waiting for the next scheduled shampoo.
One shocker? A whopping 49 percent of the female population not only wash their hair every day, but also blow dry it seven days a week.
Prolonged periods of not washing can cause cause buildup on the scalp, damaging hair and even impeding its ability to grow, Lamb said. Grime from dirt, oil and hair product can show up within four to six days for people with finer, straighter hair.
Not washing your hair regularly can make the scalp flaky and lead to dandruff. It will make you feel itchy and you can also get rashes on your scalp. “You can develop major dandruff problem if you don't wash your hair for 1 or 2 weeks,” she warned.
If you normally wash everyday, it'll take time to get used to washing it less. So start by going an extra day or two in between your normal washes. Rinse your hair with water in between shampoos and try to build up to once a week. When your hair adjusts you'll notice a dramatic difference.
The oil in itself isn't bad for the hair - in fact, it makes hair lustrous, healthy and strong, but too much oil can cause a build up that leaves hair looking limp and overly slick.
Water is effective at washing away dirt, dust, and other water-soluble debris from the hair and scalp without stripping the hair of this sebum. However, Mamelak notes that if there are other oils in the hair (from a haircare or styling product, for example), a good portion of these will be left behind as well.
Washing your hair every day or every other day can help control oily hair. Dozens of shampoos are available in drugstores and supermarkets for you to choose from — most brands are pretty similar, although you might want to try one that is specially formulated for oily hair.
In fact, when you don't wash your hair enough, you allow oils and dirt to build up on your scalp and clog your pores, paving the way for actual hair loss. That's why finding the perfect frequency for your shampooing schedule is the key to caring for your scalp and avoiding hair loss.
“Not shampooing enough will only make your dandruff worse — it causes more oil and dead skin cells to accumulate on your scalp, which the yeast and fungi just continue to feed on,” warns Beverly Hills dermatologist Stuart H.
“I typically advise patients to keep to a standard hair washing schedule, whether it is three times per week, weekly or once per month, regardless of activity level,” she says.
Not washing the hair regularly with shampoo has certain advantages like cost and time saving, reduced exposure to chemicals, and less risk of hair damage. However, it may increase the risk of scalp irritation and infections due to the buildup of sebum, dirt, and sweat.
Gross Odor
There's also your everyday body odor, sweat, and bacteria that fester in your hair. Left untreated, it can start to smell sour or mildewy, especially if you have thick hair which traps odors more easily. The longer you go without washing, the worse the stench gets.
The most common cause of smelly scalp is a buildup of skin cells, sweat and sebum (body oils). Smelly scalp can also result from: Bacteria: The mix of bacteria and sweat on your scalp can cause an unpleasant odor. Fungus: Fungus on your skin can lead to dandruff and a smelly scalp.
Many women regularly wait days and even weeks to wash their hair thanks to the popularity of blow outs, the resurgence of dry shampoos and the proliferation of anti-shampoo rhetoric.