Headache and nausea after magnetic resonance examination are often considered for the following two reasons: 1, one reason is that the patient appears claustrophobic, claustrophobia refers to the process of magnetic resonance examination occurs in the process of nuclear magnetic examination, the examined person enters the examination or the examination process appears to be a strong sense of fear, the emergence of obvious autonomic symptoms, the emergence of this symptom needs to be terminated when the examination is carried out. 2, another reason is that after doing magnetic resonance enhancement of the emergence of the acute Contrast adverse reaction, the reaction is mainly headache, nausea, rash, chest tightness, etc., the above symptoms are transient changes are relatively mild do not need special treatment.