"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."
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.
Washing hair once a week, or even every other week, can help prevent the hair from drying out while also removing any buildup of hair products. Chemically treated hair and hair of older people may be drier, so not washing it for a week can help prevent it from drying out.
Going a long time without washing your hair can cause a buildup of a yeast-like fungus called Malassezia on your scalp. Over time, this leads to a layer of dead skin cells that shed from your head in the form of oily, yellow-ish dandruff flakes. Dandruff can also make your scalp red, scaly, and itchy.
Even if the hair does not feel oily, frequent shampooing is still essential to keep the scalp environment clean and healthy, so we wouldn't recommend going any longer than three to four days without shampooing.
You might think it won't hurt, but washing your hair regularly is incredibly important for the health of your hair and scalp. "Shampooing removes sebum or oil that normally coats the hair shaft," says Brendan Camp, MD, a double board-certified dermatologist at MDCS Dermatology in New York.
shampoo can strip your hair of natural oils, and using heat products on your hair over and over again causes further damage and breakage, so washing your hair only once a week actually helps keep it in great condition.
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.
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.
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.
"Two to three times a week is best to 'wash' your hair with a shampoo," Paves says. "For the days in between, I recommend rinsing the hair with water alone. For a fresh feel and smell, you can condition from the mid-shaft out."
Let's be clear though: by wetting your hair, we don't meanwashing it. We simply mean rinsing natural hair either in the shower or spritzing water over your hair. Washing natural hair with shampoo everyday is not recommended, as this can dry the hair out significantly and cause stress to curls.
When you go too long without washing your scalp, Dr. Rubin says you can get a build-up of sebum, hair product residue, and dead skin cells. "All of this can potentially result in clogged pores, which is not good for your scalp health or your hair health," Dr. Rubin explains.
Lifestyle and diet changes to fix oily hair
Your diet should consist of foods rich in vitamin B, especially B2 and B6. It is believed that these components in your diet can help keep your sebum production in control. So, consider adding foods like leafy vegetables, pulses, and seaweed.
Washing your hair every day can strip away more oil than it should from your hair, which leaves your hair drier and more likely to break. Washing your hair every day can cause dryness, and that makes your hair much more prone to split ends. Split ends are the enemy of happy and healthy curls!
Everyone's scalp can get a little oily sometimes. But a little oil is OK! Oil (sebum) helps protect and support healthy hair. But an abnormally oily scalp can feel like a problem if it makes your hair feel greasy or dirty all the time.
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.
Can Black people wash their hair every day? No, it is not advisable to wash black hair daily as it can make your hair dry and brittle. Which shampoos are best for African-American hair? For the best results, use SLS-free shampoos that are gentle on your hair and scalp (6).
Non-wash days
Dry Shampoo: Whether it be powder or spray you prefer, there's no question that a dry shampoo can be a lifesaver on the days you're not washing your hair. While it helps absorb oils and odors, it can also help the health of your hair by eliminating blow drying.
Generally, if your hair isn't greasy or dry, you should cleanse it every two to three days, King recommends. But if you wash hair too often for your hair type, "it could be very drying to the hair, depending on the ingredients in the shampoo," King says.
Many doctors say a daily shower is fine for most people. (More than that could start to cause skin problems.) But for many people, two to three times a week is enough and may be even better to maintain good health. It depends in part on your lifestyle.