What Causes Oily Hair?

The cleanliness and neatness of one’s hair significantly influence their overall appearance. Oily hair often gives others an impression of untidiness, causing considerable distress for many individuals. Even those who maintain excellent personal hygiene may find their hair becoming greasy after just two days without washing—while others can go three to five days without noticing any oiliness. So, what causes hair to become oily so easily? Below, we provide answers to this question.

What Causes Hair to Become Oily Easily?

1. Nutritional Deficiency

Nutritional deficiencies—particularly a severe lack of vitamin B—can readily trigger excessive sebum production in the scalp. Vitamin B plays a critical role not only in maintaining healthy hair but also in regulating skin oiliness. Therefore, it is advisable to consume ample fruits and vegetables while avoiding spicy or highly stimulating foods.

2. Oily Skin Type

Skin types are generally categorized as oily, neutral, or dry—and one’s skin type directly influences scalp oil production. Individuals with oily skin tend to experience more pronounced scalp oiliness, whereas those with dry skin typically have drier, less oily hair. Although sebum provides natural protection for the scalp, excessive oil secretion can still be bothersome.

3. Staying Up Late or Pulling All-Nighters

Chronic sleep deprivation disrupts endocrine function, leading to overproduction of sebum. This excess oil can clog pores and increase acne risk. To minimize both oiliness and breakouts, it is essential to avoid staying up late regularly.

4. Excessive Liver Qi (in Traditional Chinese Medicine)

According to Traditional Chinese Medicine (TCM), excessive liver qi can contribute to oily hair. Since the liver and spleen maintain a dynamic balance within the body, overactive liver qi often corresponds with weakened spleen qi. To restore equilibrium, strengthening the spleen is recommended.

5. Hair Care Practices

Choosing appropriate shampoo is crucial: those with oily hair should avoid overly moisturizing or oil-rich formulations. Additionally, chemical treatments such as perming and dyeing can further damage hair and scalp health. Unless medically or aesthetically necessary, such procedures are best avoided.

6. Over-Washing

Many people wash their hair daily—regardless of whether it feels dirty—simply out of habit. However, excessive washing stimulates the scalp’s sebaceous glands to produce even more oil. Sebum secretion is regulated by feedback mechanisms; frequent cleansing signals the scalp to increase oil production, resulting in progressively oilier hair.

The above outlines the primary reasons why hair becomes oily easily. We hope this information proves helpful.