Why does my head hurt whenever I turn on the air conditioner?

In general, headaches that occur when turning on the air conditioning may be related to poor air circulation, tension headaches, or cerebral vasospasm. Symptoms can be relieved through medication, lifestyle adjustments, and other measures.

1. Poor air circulation: Rooms with air conditioning are usually kept closed with windows and doors shut, resulting in poor ventilation. This can lead to increased levels of carbon dioxide indoors, causing occupants to experience oxygen deficiency, slowed blood circulation, and subsequent headaches. Opening windows promptly to ventilate the room and improve indoor air quality typically helps alleviate these symptoms.

2. Tension headache: Individuals with a history of tension headaches may find their symptoms triggered by cold air blowing from the air conditioner. As directed by a physician, medications such as Nimodipine tablets or Flunarizine Hydrochloride capsules may be used to relieve symptoms.

3. Cerebral vasospasm: Cold air from an air conditioner may stimulate the brain's arteries, causing blood vessels to spasm, leading to discomfort such as migraines and dizziness. Treatment under medical guidance may include intravenous medications such as fasudil hydrochloride injection or alprostadil injection.