Other medical conditions that may cause secondary headaches include: AVM (arteriovenous malformation) Brain aneurysm Brain tumor Carbon monoxide poisoning Encephalitis Glaucoma Head injury Hydrocephalus (too much fluid around the brain) Hypertension (high blood pressure) Infections, colds, fevers Meningitis Narrowing tear, rupture or blockage of blood vessels near the brain Sinusitis (inflammation of sinuses) Sleep disorders Stroke Trigeminal neuralgia Headache triggers Some things that appear to trigger different kinds of headache pain are: Alcohol use Allergens Caffeine use Changes in weather Changing sleep patterns Depression Loud noises Neck or back strain Perfumes Pollution Skipping meals Some kinds of lighting Stress Strong smells Tobacco and tobacco smoke Too much physical activity Headache emergencies Go to the emergency room or call 911 if you notice any of these things about your headache: Feels like the worst ever even if you get headaches regularly Starts right after activities like weightlifting, jogging, aerobics or sex Gets worse over 24 hours Happens after a head injury Brings severe pain in one eye along with redness in that eye You have a history of cancer and notice a new headache Other serious things to consider are slurred speech, changes in vision, balance problems, confusion, memory loss, fever, stiff neck, vomiting, nausea, pain with chewing or a headache that starts suddenly

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Health Risks and Mental Health Concerns Even when taken orally, psilocybin is not risk-free