What is causing my recurring severe one-sided head pain every week?

Recurring, severe one-sided headaches could fall into a category of headaches known as primary headaches, which includes migraines and cluster headaches. Given the description of your symptoms, it’s plausible you could be experiencing migraines. Migraines often present with intense throbbing or pulsating pain, typically on one side of the head, and might be associated with nausea, vomiting, or sensitivity to light and sound. Cluster headaches, however, could also fit this pattern; they are marked by severe, excruciating pain on one side of the head, often affecting the eye area. You should consider the duration and accompanying symptoms for further insight. Migraines can last from a few hours to several days, whereas cluster headaches might occur in bouts lasting weeks. Think about whether you also see visual disturbances or auras, experience nausea, or find physical activities exacerbate your symptoms—these may indicate migraines. Also, review your lifestyle factors; stress, dietary triggers, sleep patterns, and hormonal changes could be contributing to these headaches. To manage or lessen the severity of these attacks, it would be prudent to document when and how often they occur and any potential triggers. Over-the-counter pain relief might provide temporary relief, but if the headaches are impacting daily life, seeing a healthcare professional for a formal diagnosis and management plan is essential. They might recommend MRI or CT scans to rule out other causes. Treatment could involve medications like triptans or preventative strategies, including lifestyle adjustments and prescribed medications. If at any point the severity or frequency of these headaches increases, or if you notice new symptoms like coordination issues or loss of vision, immediate medical evaluation would be necessary as these might be red flags for a more serious underlying issue.