A headache focused in your forehead is most often a tension-type headache, the single most common headache condition. But forehead pain can also come from migraines, sinus infections, dehydration, eye strain, and a handful of less common causes. The location alone doesn’t point to one diagnosis. What matters more is the type of pain you feel, how long it lasts, and what other symptoms come with it.
Tension-Type Headaches
If your forehead pain feels like steady pressure or tightness, like a belt being squeezed around your head, you’re likely dealing with a tension-type headache. The pain is usually mild to moderate, affects both sides of the head, and doesn’t throb or pulse. You can typically keep going about your day, even if it’s uncomfortable.
Tension headaches are triggered by stress, poor sleep, skipped meals, or holding your neck and shoulders in one position for too long. They can last anywhere from 30 minutes to several hours. Some people get them a few times a month; others deal with them almost daily. Over-the-counter pain relievers like ibuprofen or acetaminophen usually help, but if you’re reaching for them more than two or three days a week, that pattern itself can start causing rebound headaches.
Migraine Felt in the Forehead
Migraines typically cause moderate to severe throbbing pain on one side of the head, but they can center on the forehead or radiate across it. The key difference from a tension headache is what comes alongside the pain: sensitivity to light, noise, or smells, nausea, and the desire to lie down in a dark room. A migraine attack can last 4 to 72 hours without treatment.
Many people with migraines mistakenly believe they have sinus headaches. One study found that 45% of migraine sufferers reported nasal congestion or watery eyes during an attack, which mimics a sinus problem. A quick way to tell the difference: if your headache comes with sensitivity to light and nausea, there’s a 93% chance it’s a migraine rather than a sinus issue. True sinus headaches are caused by a bacterial or viral infection and come with thick, discolored nasal discharge, not the clear, watery congestion that migraines can produce.
Sinus Pressure and Infection
Your frontal sinuses sit directly behind your forehead, so when they become inflamed or infected, the pain lands right there. A genuine sinus headache comes with signs of infection: fever, thick yellow or green mucus, and reduced sense of smell. The pain often worsens when you bend forward.
Allergies can also inflame the sinuses and produce forehead pressure, but allergies alone rarely cause a true headache. If you have forehead pain with clear nasal discharge and no fever, migraine is a more likely explanation than sinusitis.
Dehydration
When your body loses more fluid than it takes in, your brain physically shrinks and pulls away from the skull. This puts pressure on the surrounding nerves and produces pain that’s often felt across the forehead. Dehydration headaches can feel dull and aching or more intense depending on how dehydrated you are, and they tend to worsen when you stand up, walk, or move your head.
The fix is straightforward: drink water and give it time. Most dehydration headaches improve within one to three hours of rehydrating, though a severe deficit may take longer. If you notice the headache started after exercise, hot weather, or simply forgetting to drink throughout the day, dehydration is a likely culprit.
Eye Strain and Screen Time
Spending hours staring at a screen forces your eyes to constantly focus and refocus on tiny pixels. That repetitive effort strains the small muscles inside your eyes and can produce an ache behind the eyes that radiates to the forehead. You might also notice dry eyes, blurred vision, or neck stiffness.
This type of headache usually resolves once you step away from the screen. Following the 20-20-20 rule helps prevent it: every 20 minutes, look at something 20 feet away for 20 seconds. Adjusting screen brightness, increasing text size, and reducing glare also make a difference. If the headaches keep coming despite these changes, an outdated glasses prescription could be the issue.
Cluster Headaches
Cluster headaches are far less common than tension headaches or migraines, but they produce some of the most intense pain a person can experience. The pain is severe, usually centered behind or around one eye but often radiating to the forehead on the same side. Each attack lasts between 15 minutes and 3 hours, with most lasting 30 to 45 minutes.
What makes cluster headaches distinctive is their pattern and their accompanying symptoms. They tend to strike at the same time each day, often one to two hours after you fall asleep, and occur daily for weeks or months before disappearing. On the painful side, you may notice a tearing eye, a drooping eyelid, forehead sweating, a stuffy or runny nose, and redness of the eye. People with cluster headaches often feel restless during an attack and pace or rock rather than lying still, which is the opposite of migraine behavior.
High Blood Pressure
Routine high blood pressure doesn’t typically cause headaches. But when blood pressure spikes to 180/120 mmHg or higher, a dangerous level called a hypertensive crisis, headaches can develop. This pain is usually a strong, throbbing sensation on both sides of the head. It may come with vision changes, chest pain, or shortness of breath. This is a medical emergency, not a wait-and-see situation.
Warning Signs That Need Urgent Attention
Most forehead headaches are uncomfortable but harmless. A small number point to something more serious. The features that raise concern, sometimes called “red flags,” include:
- Sudden, explosive onset. A headache that reaches maximum intensity within seconds, sometimes called a thunderclap headache, can signal a ruptured blood vessel in the brain.
- Neurological symptoms. New weakness in an arm or leg, numbness, slurred speech, confusion, or vision changes alongside a headache suggest the brain itself is being affected.
- Systemic symptoms. Fever, night sweats, or unexplained weight loss accompanying headaches point toward an underlying illness or infection.
- New headaches after age 50. Most primary headache conditions begin earlier in life. A brand-new headache pattern starting after 50 is more likely to have a secondary cause.
- Progressive worsening. A headache that steadily becomes more severe or more frequent over weeks, rather than coming and going, warrants evaluation.
- Positional changes. Pain that dramatically worsens or improves when you stand up, lie down, or strain (coughing, bearing down) can indicate abnormal pressure inside the skull.
If your forehead headache fits any of these patterns, getting evaluated promptly matters more than trying to figure out the cause on your own.
Narrowing Down Your Trigger
Because so many conditions produce forehead pain, paying attention to the details helps you identify what’s going on. Note how the pain feels (pressing vs. throbbing), how long it lasts, whether it’s on one side or both, and what other symptoms appear. Track what you were doing before the headache started: were you stressed, dehydrated, staring at a screen, or sleeping poorly?
A headache diary kept over two to four weeks gives you and a healthcare provider far more useful information than a single description from memory. Patterns in timing, triggers, and associated symptoms almost always point toward a specific headache type, and knowing the type is what makes treatment effective rather than guesswork.