Doctor says you should 'never go more than a few days' without washing your hair

Woman washing her hair in shower
-Credit: (Image: Getty Images/iStockphoto)


Hair wash day can often feel like a huge chore, but one doctor has warned that you shouldn't go more than a few days without washing your hair. This is due to potentially unpleasant consequences apparently.

Board-certified dermatologist Dr Jenny Liu took to TikTok to share how certain habits could be damaging your hair health. She captioned her video with the statement "scalp care is skincare", reports the Mirror.

Dr Liu then disclosed the grim reason why you should "never go more than a few days" without washing your hair, despite many people attempting to 'train' their hair to not become greasy. She revealed it's "completely a myth that our hair and scalp just cleanses itself".

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She said: "We know that sebum, dead skin build-up, all of that basically contributes to Malassezia yeast overgrowth [a fungal skin condition], that can lead to dandruff, as well as inflammation. Just even sebum itself sitting on our scalp causes oxidative stress, and that inflammation is not a healthy environment for your hair to grow."

Dr Liu said that those suffering from hair loss should "keep up with your scalp health to maximise hair growth". However, she acknowledged that the frequency of hair washing is "personal" and "depends on your scalp type" and "lifestyle".

She advises that if you have an oilier scalp or engage in regular exercise causing sweat, you'll need to wash your hair "frequently". Dr Lui says this should be done perhaps every other day or even daily, while it should be done less frequently if your scalp is dry.

She also revealed that she would "never use an anti-dandruff shampoo on a daily basis", as it can be "very drying for your scalp and hair", leading to "dry and frizzy" hair. It also disrupts the moisture barrier, which "doesn't help dandruff either". If you're washing your hair daily, Dr Liu advised using an anti-dandruff shampoo two to three times a week, leaving it on your scalp for five minutes before rinsing off.

Unfortunately, if you've been applying olive oil to your scalp to retain moisture, it's not beneficial for scalp issues. However, if you desire an oil to "nourish" your hair, Dr Liu suggests coconut oil, as it "penetrates into your hair shaft" to "really condition and temporarily reduce damage".

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