The causes of excessive body oil production include endocrine disorders, dietary factors, improper skin cleaning, genetic factors, and poor lifestyle habits.

1. Endocrine disorders: The endocrine system plays an important role in regulating the body's oil secretion. When there is an endocrine disorder, such as elevated androgen levels, it stimulates the sebaceous glands to produce more oil. Due to the development of the body, the hormone level of the adolescent population changes greatly, the secretion of androgens is relatively vigorous, and the function of the sebaceous glands is active, so it is easy to produce more oil in the skin. In addition, during special periods such as menstrual period and pregnancy, hormone levels in the body fluctuate, which may also lead to an increase in body oil production.

2. Dietary factors: Long-term intake of high-sugar, high-fat, spicy and irritating foods will affect the body's metabolism and promote the sebaceous glands to secrete more oil. For example, regular consumption of fried foods, cakes, chocolate, etc., will increase the blood sugar and lipid levels in the blood, which in turn stimulates excessive secretion of sebaceous glands. Excessive alcohol consumption will also increase the burden on the liver, affect the liver's metabolism and regulation of hormones, and indirectly lead to increased oil secretion.

3. Improper skin cleansing: If you do not pay attention to skin cleansing, dirt and stratum corneum on the surface of the skin will accumulate and clog pores and affect the normal breathing and metabolism of the skin. In order to flush out waste, the sebaceous glands secrete more oil, which causes the skin to produce more oil. Conversely, over-cleansing the skin, using an over-cleansing cleanser or washing your face frequently can disrupt the skin's barrier function and cause the skin to lose moisture, and the sebaceous glands will secrete more oil to maintain the skin's moisture balance in order to protect the skin.

4. Genetic factors: Genetics also plays a role in the body's oil production. If there is a genetic predisposition to oily skin in the family, the probability of the offspring having oily skin will also be relatively high. This is because genetics determine the size and activity of the sebaceous glands, making individuals more likely to produce oil from birth.

5. Poor lifestyle habits: Staying up late for a long time will disrupt the body's biological clock, affect the normal rhythm of the endocrine system, and lead to hormonal imbalance, which will prompt the sebaceous glands to secrete more oil. When there is too much mental stress, the body secretes stress hormones such as adrenaline, which stimulate the secretion of sebaceous glands. In addition, lack of exercise will also slow down the body's metabolism, poor blood circulation, affect the normal metabolism of the skin, and lead to abnormal oil secretion.

Body oil production is mostly caused by a combination of factors. Once these causes are understood, targeted measures can be taken to improve them. For example, adjust the diet structure, maintain healthy lifestyle habits, pay attention to skin cleanliness and care, etc. If the oil is severe and persistent, it is recommended to visit the dermatology department of a regular hospital to determine whether there are other underlying health problems.

This article is only for health science popularization and does not constitute medication or medical guidelines, it is recommended to seek medical attention in time if you have health problems.