Paroxysmal pain in the back of the head in the heat of the day may be related to heatstroke, or it may be caused by insufficient cerebral blood supply, neurological headache and other reasons. 1. Heatstroke: If you don’t pay attention to avoiding heatstroke and stay in a hot environment for a long time, you will probably suffer from heatstroke, resulting in dysfunction of the thermoregulatory center and excessive loss of water and electrolytes, which may cause paroxysms of pain in the back of the head, and may be accompanied by dizziness, weakness and other manifestations. 2. Insufficient blood supply to the brain: hot weather, the body’s metabolism accelerates, the skin and other capillary expansion, resulting in the relative blood supply to the brain, insufficient oxygen supply, may cause paroxysms of pain in the back of the head, and may be accompanied by dizziness, drowsiness and other symptoms. 3. Neurological headache: If you stay in the overheated environment for a long time, it is easy to induce neurological headache, resulting in vasodilatation, contraction dysfunction, resulting in the scalp part of the muscle, fascial contraction, may cause paroxysms of pain in the back of the head, and may be accompanied by panic, tinnitus and other symptoms. The pain in the back of the head may also be caused by other reasons. If the symptoms continue to be unrelieved, you should consult a doctor as soon as possible to diagnose the cause and then give targeted treatment.