One half of the headache and face pain are mainly seen in the following causes: i. Trigeminal neuralgia, such as primary or intracranial tumor causing secondary trigeminal neuralgia, patients can manifest as three branches of the trigeminal nerve pain, which can appear as half of the headache, face and jaw angle pain. A cranial magnetic resonance examination can be done, and an electroencephalogram can be done. Treatment is mainly given to gabapentin and pregabalin for oral administration. Second, if it is paroxysmal half of the headache and face pain, EEG is needed to understand whether the patient has atypical epilepsy, whose performance is dominated by half of the headache and face pain. Third, the patient should be asked if there is herpes zoster on one half of the head. If there is herpes zoster on one half of the head causing herpetic neuralgia, half of the headache and face pain can also occur.