Washing your face with tap water seems to have oil on it

Some people will find that their face still feels very greasy after washing it with tap water. This means that they have oily skin and will secrete too much oil. If these oils are not cleaned clean, the pores on the skin will be blocked, causing various skin diseases. Therefore, you must pay more attention to cleaning and avoid eating foods with too high fat content.

The normal development and maintenance of sebaceous glands are necessary for the dynamic balance of the skin. When they atrophy and the lipid composition of sebum is destroyed, it will cause certain skin dysfunction. Factors that affect the secretory function of sebaceous glands include: gender and age, endocrine factors, skin moisture, diet and nutrition, etc.

1. Gender and age

The secretory function of the sebaceous glands is strong at birth, drops to a very low level after 6 months, and remains at a low level during childhood. With the onset of puberty, the secretion of sebaceous glands of both men and women gradually increases, reaching a peak between the ages of 16 and 20, and then maintains this level. Sebaceous gland secretion begins to decrease in women around 40 years old and in men after 50 years old.

2. Endocrine factors

The sebaceous gland is a target organ of androgens, and its hyperfunction is mainly related to the disorder of sex hormone secretion. Testosterone increases the size of the sebaceous glands and their secretion. In particular, the overactivity of 5α-reductase, the catalyst for sebum synthesis in the human body, leads to increased secretion of dihydrotestosterone, which in turn causes increased secretion of sebaceous glands.

3. Skin moisture

The humidity on the skin surface affects the secretion and diffusion of sebum. When the humidity on the skin surface is high, the emulsification and diffusion of sebum will become slow. When the skin is in a dry environment for a long time, the sebaceous glands will become overactive and abnormal oil secretion will occur.

4. Dietary factors

Dietary factors can affect the secretion of sebaceous glands. Regular consumption of greasy food, spicy food, and high-sugar and high-calorie food can increase the secretion of sebaceous glands.

Moisturizing is crucial for oily skin care. The reason why the skin becomes oily is that when the body does not have enough water, the body will overdraw the water of the skin, and the skin will automatically secrete oil to protect the body's moisture, so hydrating and moisturizing is the key to oil control. Therefore, oily skin must pay attention to timely hydration and moisturizing while controlling oil.