Children are the flowers of our country and the masters of the new century. Their health is related to the future and revitalization of the Chinese nation, and it is the duty of every parent to let their children grow up healthy and strong. With the continuous improvement of living standard, the incidence of many diseases among children has been reduced year by year. However, the incidence rate of brain tumor in children has not changed significantly, which is related to the improvement of medical diagnosis ability, and parents’ inability to distinguish their children’s “health alarm” is also one of the important reasons. According to the current statistics, the incidence of brain tumor in children is the second most common tumor in children after leukemia. Because the cranial suture is not tightly healed in children, the cranial hypertension caused by brain tumor can be compensated by the splitting of cranial suture, so the clinical symptoms of the disease are not typical enough, which often leads to parents’ neglect and eventually delays the diagnosis and treatment of children. Therefore, parents must improve their ability to identify the “health alarms” of their children’s brain and pay attention to their children’s health from the “head”. The following are some points that parents usually tend to ignore or misunderstand: First, vomiting is not necessarily a problem of gastrointestinal tract. Vomiting is the most common manifestation of brain tumor in children, accounting for about 80%. Vomiting due to brain tumor mostly occurs in the early morning, but with the progress of the disease it can appear at any time, intermittently and repeatedly. Most of the vomiting is jet vomiting, and nearly 80% of the children also have headache or dizziness; about 10% of the children have vomiting before headache. In addition, vomiting in some children is often accompanied by abdominal pain, which often leads parents to believe that the child has a gastrointestinal problem. Therefore, when children have unexplained vomiting, parents should be alert to the presence of brain tumors and promptly perform cranial imaging examinations, including cranial CT and MRI. Secondly, some children are not able to express headache accurately, especially in younger children. Older children can complain of headache, but infants and toddlers often cause misunderstanding and neglect by parents because they cannot express headache clearly or cannot express it. Parents should be aware when their child is irritable, constantly tapping his hands on his head or scratching his hair and crying, as this may be a specific expression of the child’s headache. Headaches are very common in adults, but most of them are functional; while organic lesions are significantly higher in children than in adults. Therefore, headache symptoms are extremely important to suspect brain tumor in children. Thirdly, children’s vision loss is not necessarily myopia. Among children with brain tumor, vision loss is also common, mostly secondary to optic nerve atrophy, and a few are caused by direct compression of optic nerve by tumor. When a child has unexplained vision loss, parents need to be more careful when ruling out myopia and beware of tumor as a “bomb” in the child’s brain. This is because if the diagnosis and treatment takes longer, the optic nerve will be severely atrophied and the child will become blind. Fourthly, a child’s significantly larger head circumference is not necessarily a sign of high IQ. Some parents think that the bigger the child’s head is the smarter, this idea is not scientific. The average head circumference at birth is 32-34cm; at the age of 1, the head circumference is about 46cm; at the age of 2, the head circumference is about 48cm; at the age of 2-15, the head circumference only increases 6-7cm. If parents knock on the head of the child unintentionally, they can hear the sound of broken pot. Therefore, parents should pay attention to the child’s head circumference when they find that it is significantly larger than the surrounding children of the same age. Fifthly, drinking and urinating more does not mean the normal developmental needs of the child. Some children with brain tumor show that they are usually easy to be hungry, their appetite increases, their meal size can even reach that of adults, and they keep clamoring for water. Parents should not simply think that this is just a normal manifestation of the child’s growth and development. This is because brain tumors like suprasellar germ cell tumors, which grow in the endocrine control area of the child’s skull, often lead to endocrine function disorders in children, resulting in pathological polyhydramnios. The sixth, the child precocious puberty is not necessarily caused by excessive nutrition. With the rapid improvement of living standards, the nutritional status of children today has made a great leap compared to the last century, and “little fat pier” has become synonymous with children of this era. Due to the hormones in children’s nutritional supplements and some foods, premature development of children is no longer a rare phenomenon. However, precocious puberty in children is also often a sign of brain tumor invasion. Tumors such as craniopharyngioma, hypothalamic malformation tumor, pineal teratoma and pituitary tumor can lead to abnormal growth and development, precocious puberty or growth retardation. Therefore, parents should pay attention if they find premature growth in their children when bathing them. Seventhly, parents should be highly alert to children who have convulsions without any cause. Brain tumor can produce irritation symptoms to the surrounding normal brain tissues and cause convulsions in children. According to statistics, about 10% of pediatric brain tumors occur in epilepsy. Therefore, once children are found to have unexplained convulsions, parents should at least take their children to the hospital for cranial CT and EEG examination to exclude brain tumors with limited growth. Currently, the treatment of brain tumors in children is mainly surgery, radiotherapy and chemotherapy. Being able to achieve early detection, early intervention and early treatment, the prognosis of the affected children will be significantly improved. Therefore, in a sense, parents are the “personal doctors” of their children, and the level of your vigilance directly determines the health of their children. Parents should not despair once their children suffer from brain tumor, because the current medical level can significantly improve the cure rate and quality of life of children with brain tumor.