A pang of pain behind the ear is usually caused by the following factors: First, the most common factor is a viral cold. In the early stages of a viral cold, when the virus infects the body, pain in the brain nerve roots of the head occurs, usually particularly significant with pain behind the ear. Second, such as viral encephalitis can also cause a burst of pain in the head behind the ear. Third, such as nervousness and mental factors can also cause pain in the back of the head, such as anxiety and irritability, mood swings, depression and other situations will appear such a headache. Fourth, environmental factors can also cause headache behind the ear, for example, people in the plateau can easily trigger headache. Cold, sun exposure or noisy environment around can also cause headaches here. Fifth, headaches can also occur when the brain is traumatized or overworked. Sixth, changes in hormone levels, for example, can also cause headaches behind the ear, such as around a woman’s menstrual period, which can lead to clinical manifestations of a painful pang in the head behind the ear.