14 years old often chest tightness head dizziness may cause: anemia, neurosis, cerebrovascular lesions, heart disease and so on. 1. Anemia: iron deficiency anemia is the most common, followed by megaloblastic anemia, adolescents are in the growth and development period, if the long-term lack of iron, vitamin B12, folic acid and other nutrients, anemia will occur. Patients with anemia may have symptoms of chest tightness, dizziness, weakness and easy fatigue. It is recommended to carry out routine blood and anemia triple test obvious diagnosis, according to the type of anemia active drug treatment, such as supplementation of ferrous sulfate, folic acid, vitamin B12 and so on. 2. Neurosis: it is related to plant nerve dysfunction, often accompanied by insomnia, nervousness and anxiety, loss of appetite and other symptoms, due to poor rest at night, which affects the energy during the day, and symptoms of fatigue, chest tightness, dizziness. Consider the treatment of nutritive nerve drugs, such as methylcobalamin tablets, vitamin B12 and so on. 3. Cerebrovascular lesions: Congenital malformation of cerebrovascular development in adolescents, resulting in abnormal cerebral blood supply, dizziness and lightheadedness, accompanied by symptoms of chest tightness and discomfort. At this time, it is necessary to carry out cranial magnetic resonance examination to check. When cerebrovascular malformation affects cerebral blood flow, it is recommended to consider interventional surgery, stent implantation for stenosis and ligation for hemangioma. 4. Heart disease: in children with congenital heart disease, after the heart fails to compensate for its function at puberty, cardiac insufficiency causes chest tightness, breathlessness, dizziness and other signs of insufficient blood supply to organs. Heart ultrasound examination to clarify the cause of the disease, and actively take surgical treatment. It is recommended that patients go to the hospital in time, under the guidance of the doctor to clarify the cause of the disease, targeted treatment and intervention.