As the college entrance examination is approaching, students have been fighting for a long time, so it can be said that they are physically and mentally exhausted. But in order to get better grades, everyone is still struggling to hold on. Many candidates at this time may be more or less memory loss, concentration can not focus, insomnia, sleeplessness, emotional irritability and other manifestations, but to the hospital and can not find out the problem. In fact, these may be sub-health caused trouble. Secondary school students will also be sub-health? The World Health Organization to these non-organic lesions, but there are functional changes in the state known as the “third state”, our country is called “sub-healthy state”. Sub-health is actually a transitional stage between human health and disease, although it does not meet the diagnostic standards of modern medicine related to disease, but people have a lot of physical discomfort and bad psychological experience, in fact, it is in a state of low physiological function. If this state exists for a long time, it can make the physical condition deteriorate gradually and eventually lead to the occurrence of diseases. However, if timely adjustments can be made, sub-health will gradually improve and restore health. Nowadays, the trend of lowering the age of sub-health has become more and more obvious, and secondary school students have also become a high-incidence group of sub-health. Using different assessment methods, the detection rate of sub-health among secondary school students in different regions and grades in China varies greatly, ranging from 10% to 80%. As the grade level rises, the pressure of study, the burden of schoolwork and the pressure to advance to higher grades continue to increase, and the detection rate of subhealth also increases. Studies have shown that high school is the most prevalent stage of subhealth among middle school students, and that symptoms are more pronounced in seniors than in freshmen. How is sub-health recognized? Symptoms of sub-health among secondary school students can be categorized into physical symptoms, psychological symptoms and social adjustment. A survey with 132 students found that inattention is the most frequent subhealth symptom, which can be found in about 2/3 of high school students. Others, such as: about 1/3 of high school students may have low energy, dizziness and headache, irritability and forgetfulness, and about 1/4 may have insomnia and dreaminess, low mood, fatigue and slow reaction. And loss of appetite and agitation can be seen in about 1/8 of high school students. Why do high school students suffer from sub-health? In addition to the physical and psychological effects of the stress of study and advancement mentioned above, cerebral hypoxia is also an important but often overlooked factor that leads to the development of sub-health in high school students. There is a view that “hypoxia is the culprit of sub-health”. When the body is in a state of hypoxia, energy production will be in short supply, so that the body does not have enough energy to complete normal physiological activities, resulting in a series of physiological functions or disorders of the phenomenon. This disorder is the physiological state of sub-health. The body’s oxygen consumption is the largest organ is the brain – the weight of the brain, although only 2% of the body weight, but the oxygen consumption is 20% of the body’s oxygen consumption. Secondary school students (especially senior high school students) brain consumption are very large, so it is not surprising that their sub-health detection rate is high. Help candidates get rid of sub-health in time The college entrance examination is approaching, the candidates to stay away from sub-health in time, should pay attention to the following points. Parents should encourage and support the main, so that the candidates can be in a good mood, reduce the mental stress. Before the examination can be appropriate to relax, a good mood can not only reduce the occurrence of sub-health, but also allow candidates to play better in the examination room. Reasonable diet before the examination should pay attention to reasonable diet. Pay attention to ensure nutrition and hygiene, meat and vegetables. Don’t eat too much greasy food, and don’t overeat or eat too many cold drinks. Moderate physical exercise Physical exercise is recognized as a good way to improve sub-health. Moderate physical exercise not only improves physical symptoms, but also has the effect of reducing psychological stress and negative emotions. The fatigued brain cells can be said to get the best “rest” during physical exercise. However, it should be noted that exercise should avoid injuries and the amount of exercise should not be too large. Regular life, ensure sleep Research has found that the quality of sleep of senior students is obviously worse than that of first-year students. If coupled with insufficient exercise, there will be serious fatigue and other physical symptoms. And the less sleep the candidate gets, the higher the risk of sub-health occurring. As the college entrance examination approaches, candidates should minimize staying up late. For senior candidates who have already experienced symptoms of brain fatigue, such as poor concentration, memory loss, headache, dizziness, insomnia and drowsiness, in addition to the above measures, oxygen inhalation can be used to improve brain hypoxia and correct the state of subhealth. A study found that: to senior students through the nasal tube oxygen inhalation for 15 minutes, can significantly improve the accuracy of student work and relieve brain fatigue. This shows that oxygen inhalation is helpful in delaying the occurrence and development of brain fatigue. Candidates can inhale oxygen when they feel fatigued, after meals and before bedtime, each lasting about half an hour to an hour. Hyperbaric oxygen therapy may also be considered if the symptoms of brain fatigue are more pronounced.