Physiological developmental characteristics, secondary sexual characteristics and common sexual development problems in adolescent males

Adolescence is the transitional period from childhood to adulthood, generally referring to the age of eleven or twelve to twenty-three or twenty-four. It is often further divided into adolescence (11-15 years old) and youth (16-24 years old). The defining characteristic of puberty is a critical period marked by a series of dramatic changes in physical form, physiological functions, and intellectual behavior. During this time, adolescents experience rapid increases in height and weight, and their organs and physiological functions gradually mature, particularly in the development of sexual organs, sexual function, and sexual characteristics, resulting in a series of noticeable changes.

In terms of physical development, adolescence is another peak period of rapid weight and height growth in a person's life, marking the second rapid growth and development stage after birth. According to surveys in my country, between the ages of 7 and 17, the average weight of primary and secondary school students in my country increases by about 33 kilograms, from 22 kilograms to about 55 kilograms, an average increase of 3-4 kilograms per year. About half of adult weight is gained during this period. Height also increases rapidly, increasing by about 48 centimeters during these ten years, an average increase of 4-5 centimeters per year. 20% of adult height is achieved during this period.

Another important characteristic of puberty is sexual development, and the obvious development of sex is a significant marker of puberty. The most significant change in sexual development during puberty is the appearance of secondary sexual characteristics, also known as secondary sexual characteristics or accessory sexual characteristics. Primary sexual characteristics are those that are present from birth, such as the distinct sex organs of males and females, including different gonads and external genitalia. Secondary sexual characteristics are those that begin to appear during puberty, giving males physical features that distinguish them from females, such as becoming more robust, muscular, with stronger limbs, a deeper and louder voice, the growth of facial hair, and the appearance of an Adam's apple. Puberty also brings significant changes to the development of sex organs, such as enlargement of the testes, penis, and scrotum; the gradual maturation of the gonads and the beginning of sperm production, gradually acquiring the ability to reproduce; the development and secretion of the prostate gland, which may lead to nocturnal emissions; and the appearance and increase of pubic and axillary hair. The arrival of puberty signifies that males have become sexually and reproductively mature adults capable of procreation. Puberty is also the optimal period for intellectual and psychological development in a person's life, and a crucial stage for learning and memory in adolescents.

Nocturnal emission is a sign of the development and maturation of male sexual organs and a normal physiological phenomenon during puberty. The age of onset varies among individuals, but the first occurrence is usually around age 16. Nocturnal emission is not a pathological condition; it is a normal physiological phenomenon caused by testicular development and the secretion of accessory glands such as the seminal vesicles and prostate during puberty. However, due to a lack of understanding of sex education among teenagers, they may be ashamed to ask for help and may consider it abnormal. Improper handling of this can also affect their studies and work.

Nocturnal emission, also known as wet dreaming, is a non-sexual ejaculation that occurs during sleep due to dreaming. The physiological basis for nocturnal emission is the maturation of sexual organs during puberty, and it is also related to exposure to certain sexual knowledge and stimulation. Occasional nocturnal emission is normal, but excessive frequency is abnormal. Frequent nocturnal emission can stem from inflammation of the reproductive organs, such as balanitis, urethritis, or prostatitis, or it may be caused by excessive exposure to sexual stimulation, mental stress, or overwork.

Delayed sexual development refers to the delayed appearance of male sex organs and secondary sexual characteristics during puberty. If the sex organs remain immature after the age of 20, it is known as sexual inhibition. Delayed sexual development not only postpones the appearance of sex organs and secondary sexual characteristics, but also results in physical development such as height and weight below average for the same age group. The causes are mostly constitutional, such as nutritional deficiencies, chronic diseases, endocrine disorders, and parasitic diseases. It may also be influenced by genetic factors, such as congenital hypogonadism. Prevention and treatment of delayed sexual development should focus on early diagnosis and treatment. Targeted treatment for constitutional causes is often effective, while for those caused by genetic factors, medical advice should be sought.