"Shampoos are meant to clean the scalp and hair. They remove dirt, oil, and debris. However, frequent shampooing can cause dryness, an itchy scalp, and hair loss," says Fatima Fahs, MD, a dermatologist in the United States.
Fahs explains that sebum from the hair follicles nourishes the hair, so frequent shampooing can irritate the scalp and damage the hair, according to Everyday Health.
How often you wash your hair depends on the individual.
How often should I wash my hair?
Everyone's scalp and hair condition is different, so the frequency of shampooing will vary. For example, a person with curly hair may have a drier scalp than a person with straight hair.
According to Jennifer Davis Alexander, a skin care expert in the US, if your scalp and hair are prone to oiliness, you will have to wash your hair more often.
According to Ms. Alexander, factors that can affect the frequency of shampooing include exercise, swimming in a chlorinated pool, working with dirt and chemicals, using hair products, and styling hair.
In addition, ethnicity can also affect hair. Accordingly, for Caucasians and Asians, hair follicles are often round and symmetrical. This causes sebum to adhere more tightly to the scalp and hair.
According to a study published in the journal Skin Appendage Disorders in 2021, Asians should wash their hair 5-6 times a week.
How to wash hair
According to the American Academy of Dermatology (AAD), you should massage your scalp with shampoo. Massaging shampoo into your scalp will help increase blood flow to nourish your scalp and hair follicles. You should also use conditioner on the ends of your hair.
According to Ms. Fahs, after massaging, you need to wait a few minutes before rinsing so that the active ingredients in the shampoo can work effectively.
The "no poo" trend
The "no poo" trend is popular right now, where people who follow this trend will not wash their hair with shampoo. However, not using shampoo can clog hair follicles, weigh down hair, and disrupt the pH, sebum, and microbiome of the scalp, according to Everyday Health .
And if you experience unusual dryness or itching of the scalp, see a dermatologist for a checkup.
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