Bright light and headache: possible causes and relief

Notice whether pain follows sunlight, screens, glare, poor sleep or skipped meals. Migraine commonly brings light sensitivity and may include nausea, pulsing pain or a need to rest in a quiet room. A blocked or inflamed nose can create facial pressure, while a cold or COVID-19 may bring headache with other illness symptoms. Heat exposure and fluid loss can cause headache, weakness or dizziness. Allergic rhinitis may add congestion and itchy eyes. Anxiety can increase muscle tension and make normal light feel harder to tolerate.

Move to a cool, dim room and reduce screen brightness without sitting in complete darkness for long periods. Sip fluids and eat something if you have missed a meal. A hat or sunglasses can reduce outdoor glare; take regular screen breaks and check that your glasses prescription is current. Keep a brief record of triggers, pain location, associated symptoms and medicines used. Use pain relief only as directed on its label or by a clinician, and avoid taking it repeatedly without advice.

Get urgent help for a sudden severe headache, new weakness, trouble speaking, confusion, fainting, a stiff neck, seizure, persistent vomiting or a new change in vision. Seek prompt assessment for headache with fever after heat exposure, marked dehydration, or a rapidly spreading rash. Arrange a routine appointment if headaches are new, frequent, changing pattern or interfering with work, sleep or daily activities.

Does my pattern fit migraine or another cause? Could my medicines, vision, hydration or sleep be contributing? What treatment should I use at the first sign? Which warning symptoms need emergency care?