There are a few reasons why your hair might get oily after just one day of not shampooing and conditioning.
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Overactive sebaceous glands: The sebaceous glands in your scalp produce oil called sebum. If the glands are overactive, they can produce too much sebum, which can make your hair look greasy and oily.
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Genetics: Some people naturally have more active sebaceous glands, which can lead to oilier hair.
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Hormonal changes: Hormonal changes, such as puberty, pregnancy, or menopause, can affect sebum production and result in oilier hair.
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Weather and environment: Humid weather and exposure to pollutants and chemicals can make hair oilier.
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Hair type: People with fine or thin hair may notice oilier hair sooner than those with thicker, coarser hair.
To minimize oiliness, you may want to try washing your hair every other day and using a gentle, sulfate-free shampoo. You can also try using dry shampoo or a leave-in conditioner to absorb excess oil.
