Symptoms of head fatigue are mainly manifested as emotional instability, insomnia and slow thinking. 1. Emotional instability: the brain is in a state of prolonged fatigue, can not get enough rest, may cause emotional anomalies, resulting in emotional instability, such as frequent temper tantrums, often quarrel with others, may also be accompanied by depression, anxiety and other bad moods. 2. Insomnia: Head fatigue, especially long-term head fatigue, is likely to induce brain dysfunction, resulting in cerebral vasodilatation, contraction dysfunction, which may cause insomnia, dizziness, headache. 3. Slow thinking: If the head is in a state of long-term fatigue, can not get a good rest, it is easy to lead to slow thinking, memory will gradually decline, but also may be accompanied by mental fatigue, lack of concentration, weakness and other manifestations. It can be seen that head fatigue is more harmful. Therefore, patients should pay attention to reasonable rest, to ensure adequate sleep, to prevent head fatigue, if any discomfort timely medical treatment.