1, what is the development order of adolescent boys?

In adolescence, the development order of boys is as follows:

10-11year-old testicles and penis began to increase;

11-12 years old, the prostate gland began to secrete, and the larynx was enlarged;

12-13 years old, the testicles are enlarged, the penis grows rapidly and the pubic hair grows;

13-14 years old has a thick voice and induration under the nipple;

14-15-year-old armpit hair appeared, voice changed, and nocturnal emission for the first time;

15-16 years old scrotum becomes darker;

16-17 years old with long beard and prismatic pubic hair distribution;

17-18 years old has a slow growth trend and a transition to mature type.

2. What about nocturnal emission?

Nocturnal emission is a physiological phenomenon. Men generally begin to have nocturnal emission around 15 years old. According to the survey, it happens to almost every healthy man. The causes of nocturnal emission are:

First, when the sperm is full, it will overflow: after a man enters puberty, the testis will continuously produce sperm, and the seminal vesicle and prostate will also continuously produce secretions. With the continuous production of sperm and secretions, when a certain amount is stored in the body, it will be discharged.

Second, local stimulation: too tight underwear, bedding compression and friction, phimosis, too long foreskin, urethritis, prostatitis and other diseases can all cause local stimulation and lead to nocturnal emission.

Third, sexual stimulation: too close contact with women, watching descriptive novels or movies, so that the mind is too focused on sexual issues, leading to nocturnal emission during sleep. The habit of masturbation can also easily lead to nocturnal emission.

Some young people, because of their lack of sexual knowledge, take nocturnal emission seriously, thinking that it will "greatly hurt their vitality", affect their development and produce fear and anxiety. In fact, this is completely unnecessary.

3. Is nocturnal emission harmful to the body?

Nocturnal emission is the ejaculation of men without sexual intercourse, and the manifestations of nocturnal emission are wet dream and spermatorrhea. Dream essence is nocturnal emission accompanied by dreams during sleep, while spermatorrhea is nocturnal emission during waking. Is nocturnal emission harmful to the body? Some concrete analysis should be made to answer this question. Unmarried young men have spermatorrhea, and the frequency of spermatorrhea of young people from once a month to twice a week is a normal physiological phenomenon, full of sperm and overflowing. Young people who have had the above-mentioned frequency of nocturnal emission, please don't be afraid, because this is a normal sexual physiological reaction and is harmless to the body. What needs to be made clear is that because our country does not popularize the knowledge of sexual physiology and health, although nocturnal emission itself is harmless to the body, the psychological load caused by nocturnal emission cannot be underestimated. Some young people accept some wrong sexual physiological concepts, regard semen as more important than blood, and think that nocturnal emission is the loss of the "essence" of the body and hurts the "vitality" of the body. Every time there is nocturnal emission, they are anxious and even terrified. Some people also suffer from mental weakness, which affects their study and work and their physical and mental health. Therefore, it is very necessary to correctly understand and treat nocturnal emission.

However, if the spermatorrhea is too frequent, for example, several times a night or semen will flow out as soon as there is sexual impulse or even asexual impulse, this is not normal. Abnormal nocturnal emission can be summarized into two reasons. First, there are pathological changes in the urogenital system, such as balanitis, urethritis, prostatitis and so on. Timely treatment of these diseases can make nocturnal emission return to normal. Second, the erotic ideas are too heavy, and they often fantasize, which makes the sexual center too tired and reduces the control ability of subordinate ejaculation institutions. Therefore, once there is sexual impulse, semen will flow out. For this kind of patients, qigong therapy can be used, and at the same time, we must make up our minds to abandon too many pornographic ideas. People's sexual desire is dominated by people's consciousness and ideas. As long as we constantly strengthen self-cultivation, cultivate moral sentiments, get rid of vulgar tastes, stop watching pornographic books and movies, and concentrate on study and work, frequent nocturnal emission is not difficult to treat.

4. What problems should boys pay attention to during the voice change period?

Teenagers who enter adolescence are in the period of voice change in youth. At this time, it is especially necessary to pay attention to protecting the vocal cords, otherwise it may affect life. As we know, the primary function of the throat is pronunciation. When pronouncing, the glottis are narrowed by the muscles in the larynx that close the glottis, and then the airflow exhaled by the lungs passes through the glottis and vibrates the vocal cords. The human larynx is a highly sensitive organ, and the vocal cords are like the reeds of an organ. If the vocal cords are thin and narrow, the sound is high-pitched, otherwise it is low-pitched. Pronunciation is related to the strength, the tension of simultaneous band and the intensity of exhaled airflow. If the vocal cords are relaxed and the expiratory intensity is small, the tone is low; On the contrary, the vocal cords are tense, and the breath intensity is high and the tone is high. The width and thickness of adult male vocal cords are much larger than those of children and women, so it is difficult for men to pronounce high notes. If there is something wrong with the vocal cords, the voice becomes hoarse. Ligament changes greatly during puberty. At this time, the Adam's apple grows rapidly, the vocal cords grow thicker and thicker quickly, and there is mild congestion. The original children's voice gradually disappears and a low voice appears. At this time, it is called the voice change period. The voice change period mostly refers to boys, with obvious changes. Although there are some changes in girls, they are not significant. The first thing in the voice change period is to protect your voice, and don't use it excessively, otherwise it will increase the burden on the vocal cords and make them more congested and edema; Do not eat or should not eat spicy and greasy food; Smoking and drinking should be prohibited; Once the voice becomes hoarse, rest immediately and talk less, let alone speak loudly. At ordinary times, we should insist on physical exercise, improve physical resistance, and do a good job in the prevention and treatment of upper respiratory tract infections.

5. What are the key points of male external genital health care?

External genitalia hygiene is a "blind spot" for boys and teenagers, and many people don't know why male external genitalia also needs cleaning. This can be analyzed from the following three aspects:

First, male external genitalia includes penis and scrotum. The penis is divided into penis head, also called glans penis and penis. The junction of penis head and penis is called coronal sulcus, and there is an upturned foreskin in the coronal sulcus. Exfoliated epithelial cells, gland secretions in the foreskin, dust and residues after urine evaporation accumulate in the foreskin to form a scale, which is irritating to the penis head and easy to cause inflammation. If the prepuce still covers the penis head completely at the stage of youth development, it is called "phimosis". If it can be turned up, but the penis head can not be exposed often, it is called "the prepuce is too long". People with long foreskin and phimosis, because the foreskin tightly wraps the penis head, produce more scales and are more harmful. Studies have shown that echinococcosis has carcinogenic effect, which can cause penile cancer. At the same time, unclean external genitalia can induce the occurrence of spouse's reproductive diseases after marriage.

Second, scrotum is an important tissue to protect testis. Its skin surface is rich in sweat glands, which often secrete sweat. If it is not cleaned for a long time, it will cause scrotum infection and inflammation under the action of sweat and bacteria on the skin surface. Long-term sweat stimulation is also an important cause of scrotal eczema.

Third, the anus discharges feces every day, and there is always a small amount of feces left in the anus. There are many bacteria in the feces, and the warm and humid perineum has become a good breeding ground for bacteria.

For the above reasons, young men should also clean their perineum frequently. When cleaning, you should pay attention to washing the penis and scrotum at the front, especially to remove the dirt in the foreskin, and then clean the anus at the back to keep these parts clean. Teenagers with long foreskin and phimosis should ask a doctor to check them and see if they need surgery.

6. How to prevent and treat "acne"?

"Acne" is a chronic inflammation of hair follicles and sebaceous glands, which mostly occurs on the face, chest and back. It can form blackheads, rashes, pustules, nodules and cysts. Acne is mostly born in adolescent men and women, and after puberty, most of them naturally heal or relieve. The initial damage of acne is mostly blackhead acne. In a few severe cases, besides blackheads, papules and pustules, there are inflammatory nodules or cysts from broad beans to nails. Cysts can fester, form abscesses, and often form sinuses and scars after rupture. Acne patients are mostly unconscious, and if inflammation is obvious, it can cause pain or tenderness. Prevention and treatment of acne should first pay attention to adjusting the function of digestive tract, changing eating habits, eating less fat and sweets, and eating more vegetables and fruits. At ordinary times, we should insist on washing face, bathing and changing clothes frequently. Young women should use less cosmetics on their faces. Cosmetics that may cause skin allergies should be banned to reduce the external conditions of the disease. Once you have acne, always wash the affected area with warm soapy water, do not squeeze it, and do not use bromine or iodine drugs. At the same time, we should insist on taking vitamin B, vitamin b6, vitamin b2, vitamin B complex and calcium pantothenate. Severe patients can consult a doctor. Appropriate use of endocrine agents, such as diethylstilbestrol powder, chorionic gonadotropin and progesterone. Patients with infection can use appropriate antibiotics. Topical drugs can also be used appropriately according to the doctor's guidance. You can also add 10 ml vinegar to the face wash water to wash or apply the face. Avoid using grease cosmetics.