If you keep your home too cool, it can actually cause the blood vessels in your head to start to contract causing a headache. Most home cooling modes are set anywhere from 69-72 degrees. If you have your thermostat set much lower than this, try turning it up a few degrees to give your head a break.

Can sleeping in a cold room cause headaches?

Sleeping in a cold room or sleeping with the neck in an abnormal position may also trigger a tension headache. Other triggers of tension headaches include: Physical or emotional stress. Alcohol use.

Why does the air conditioner give me a headache?

The problem arises when the AC extracts too much moisture from the air. As you breathe in the dry air, it will dry up your nasal cavity. A dry nasal cavity is highly susceptible to inflammation and irritation, which can trigger a sinus headache as they restrict normal blood flow.