What Causes Oily Hair?
Jan 12, 2021
Source: Cainiu Health
Dr. Li Ruizhi
Introduction
What Causes Oily Hair?
1. Overactive Sebaceous Glands: Excessive sebum production results from hyperactivity of the sebaceous glands, leading to increasingly abundant oil secretion.
2. Hormonal Imbalance: Chronic sleep deprivation, for example, can disrupt endocrine function, causing skin dehydration and dullness.
3. Dietary Factors: Consumption of spicy or greasy foods contributes to increased oiliness.
Oily hair is often characterized by excessive sebum secretion from the scalp, resulting in shiny, thin, and sparse hair. Clinical evidence indicates that excessive oiliness of the hair may be associated with endocrine function, psychological state, and certain medications. So, what causes oily hair? Below, we address this question.
What Causes Oily Hair?
1. Overactive Sebaceous Glands
Oily hair results primarily from overactivity of the sebaceous glands. Excess production of androgens (male hormones) can stimulate heightened activity of these glands, leading to increased sebum secretion. Additionally, dehydration contributes significantly to oily hair. An imbalance between water and oil—particularly insufficient hydration—can trigger excess oil production on the face and scalp. For individuals with oily skin or scalp, adequate hydration is essential; only when water and oil are properly balanced will the skin remain neither dry nor excessively oily. Furthermore, frequent shampooing may paradoxically exacerbate oiliness.
2. Endocrine Factors
Oily hair may also stem from endocrine imbalance. Chronic sleep deprivation, for example, disrupts normal endocrine function, leading to transepidermal water loss, dull complexion, and excessive sebum production. Therefore, maintaining a regular sleep schedule—and avoiding prolonged late-night activity—is crucial. Moreover, chronic stress and extended exposure to computer screens contribute to skin dehydration due to electrostatic effects, which in turn triggers compensatory sebum overproduction and results in oily hair. It is advisable to limit screen time and minimize prolonged electromagnetic radiation exposure to help reduce oiliness.
3. Dietary Factors
Oily hair may also result from poor dietary habits. Consumption of spicy or greasy foods stimulates sebaceous gland activity, thereby increasing scalp oiliness. Thus, cultivating healthy eating habits—such as incorporating more fresh fruits and vegetables rich in vitamins—is highly recommended. Drinking ample warm water daily helps maintain optimal hydration levels and effectively alleviates excessive scalp oiliness. Additionally, some shampoos and hair care products contain oil-based ingredients that may overload the scalp and further promote excess sebum production.
The above outlines the primary causes of oily hair. We hope this information proves helpful.
