What are the possible causes of a pulsating headache on the left side of my head?

One possible reason for a pulsating headache on one side of your head (like the left side of your head) might be a migraine. Migraines are a common type of headache that often cause a strong, pulsing or throbbing pain on one side or both sides of the head. Bright light or loud noises can make migraine headaches feel worse. Nausea or vomiting can also happen during migraine headaches. Some (but not all) people with migraines may experience a warning sign called an 'aura,' which can include visual changes (like flashes of light or shadows) before the headache starts. If you're experiencing these symptoms, you can check your symptoms with Ubie's free AI-powered tool to better understand what might be causing your headache.

Other health conditions besides migraines can cause a throbbing headache on one side of your head. Consulting a healthcare provider is the best way to determine why you are experiencing these symptoms and what the appropriate treatment is (because the correct treatment will depend on what is causing these symptoms). It is especially important to seek urgent medical care if the headache is severe, worsening, and/or occurs with other symptoms like sudden weakness or numbness that you haven't had before.