Headache occurs when the head is bowed down, there are two main aspects: 1, cervical vertebrae abnormality: for example, cervical disc herniation or cervical spinal stenosis, bowing down causes cervical spinal stenosis to be more severe, and headache may occur when the head is bowed down. Cervical blood vessel abnormalities, low head can cause the narrowing of blood vessels supplying the brain or insufficient blood supply, can also cause a headache when the head is lowered. Neck joint abnormalities, low head neck joint position changes, can also radiate a headache; 2, ENT diseases: such as chronic sinusitis, frontal sinusitis, maxillary sinusitis, can appear as soon as the head down on the headache, headache relief after lifting the head.