Tight hair, heavy hair, insufficient blood supply to the brain.

There are many causes of tight hair, such as cervical hyperplasia, spinal stenosis, which causes insufficient oxygen supply to the brain, iron deficiency anemia leading to insufficient blood supply to the brain, stress leading to insufficient oxygen supply to the brain, insomnia and poor rest can also lead to this situation. Among them, iron deficiency can lead to insufficient synthesis of hemoglobin in the brain, so it is insufficient to carry oxygen. If it sinks and dizziness, it may be insufficient blood supply to the brain and unstable blood pressure. It can reasonably arrange diet, properly supplement foods with high iodine content, pay attention to rest, do not use excessive brain, and breathe fresh air to relax.