Child’s pain in the back of the head, dizziness, double shadows in the eyes, vomiting may be caused by meningitis, brain tumor, heatstroke and so on. 1. Meningitis: Meningitis may be caused by infections such as Mycobacterium tuberculosis, Streptococcus pneumoniae and enterovirus. Patients will not only have symptoms of increased intracranial pressure such as severe headache, vomiting, optic nerve disk edema, but also fever, epilepsy, limb movement disorders and other manifestations. If the child has meningitis, there will be pain in the back of the head, dizziness, double shadows in the eyes, vomiting and other manifestations. 2. Brain tumor: the etiology of brain tumor is not clear, and it is considered to be related to ionizing radiation. Patients will have headache, vision loss, vomiting and other manifestations of increased intracranial pressure, as well as other symptoms such as sensory impairment, hemianopsia, aphasia, epilepsy and so on. If the affected child develops a brain tumor, he/she may show pain in the back of the head, dizziness, double shadows in the eyes, and vomiting. 3. Heatstroke: Heatstroke may be caused by prolonged exposure to high temperature environment and dysfunction of body heat dissipation. Patients will have dizziness, headache, thirst, twitching limbs, nausea and vomiting, excessive sweating and other manifestations. Children with pain in the back of the head, dizziness, double vision in the eyes, vomiting, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.