A sinus headache is facial pain and pressure caused by inflamed or infected sinuses, the air-filled cavities behind your forehead, cheeks, and nose. But here’s the most important thing to know: roughly 88% of people who believe they have sinus headaches actually have migraines. A large study of nearly 3,000 patients with self-diagnosed or even physician-diagnosed “sinus headache” found that the vast majority met the clinical criteria for migraine instead. Understanding the difference matters because the treatments are completely different.
What a True Sinus Headache Feels Like
When your sinuses are genuinely inflamed, pain tends to center over the affected sinus. That means pressure and aching across your forehead, behind and between your eyes, or in your cheeks and upper teeth. The pain typically feels deep and constant rather than throbbing, and it gets worse when you bend forward or lie down because those positions increase pressure in the sinus cavities.
The key distinguishing feature is what comes along with the pain. A true sinus headache almost always follows a cold or upper respiratory infection, and it comes with thick, discolored nasal mucus (yellow or green, not clear), a reduced sense of smell, and sometimes fever. If your headache comes with clear nasal drainage, no preceding cold, and symptoms like light sensitivity or nausea, you’re far more likely dealing with a migraine, even if the pain is centered around your sinuses.
This confusion happens because migraine and sinus inflammation activate the same nerve network, the trigeminal system, which runs through your face. Both can cause pain in exactly the same locations, and migraines can even trigger nasal congestion and a runny nose. The overlap is so significant that the International Headache Society considers the term “sinus headache” outdated, preferring to classify genuine cases as “headache attributed to disorder of the nose or paranasal sinuses.”
What Causes Sinus Inflammation
The most common trigger is a viral infection. A regular cold causes swelling in the sinus lining, which traps mucus and creates that familiar pressure sensation. Most sinus headaches start this way and resolve on their own within a few weeks. Occasionally, bacteria move into the stagnant mucus, turning a viral sinus infection into a bacterial one that may need antibiotics.
Structural problems in the nose can also set the stage. A deviated septum (where the wall between your nostrils is off-center) or nasal polyps (soft growths in the sinus lining) can block normal mucus drainage. When mucus can’t flow freely, it pools in the sinuses and creates persistent pressure. People with these structural issues tend to get sinus infections more frequently.
Acute vs. Chronic Sinus Pain
How long your symptoms last tells you a lot about what’s going on. Acute sinusitis lasts less than four weeks and usually clears up with basic treatment. Subacute sinusitis lingers for four to eight weeks, often because initial treatment didn’t fully resolve the problem. Chronic sinusitis means symptoms have persisted for 12 weeks or longer, and it typically requires a different treatment approach, sometimes involving imaging or a referral to a specialist.
Most sinus headaches from a cold fall into the acute category. If your facial pressure keeps coming back or never fully goes away, that pattern suggests either a chronic sinus issue or, more likely given the statistics, recurring migraines that you’ve been interpreting as sinus problems.
Relief That Actually Helps
For a genuine sinus headache, the goal is to get your sinuses draining again. Nasal saline irrigation is one of the most effective tools. Using a neti pot or squeeze bottle, you flush a saltwater solution through your nasal passages to thin trapped mucus and rinse away the irritants causing swelling. Use distilled or previously boiled water (never tap water) with non-iodized salt. You can do this once or twice a day while you have symptoms, and it’s safe enough that some people use it regularly as prevention.
Over-the-counter combination products pair a pain reliever like acetaminophen with a nasal decongestant. The decongestant shrinks swollen tissue in the nasal passages so mucus can drain, while the pain reliever addresses the headache itself. These are meant for short-term use. Decongestant nasal sprays in particular should not be used for more than three consecutive days, as they can cause rebound congestion that makes the problem worse.
Steam from a hot shower, warm compresses over the sinuses, and staying well hydrated all help thin mucus and promote drainage. Sleeping with your head slightly elevated can also reduce overnight pressure buildup.
When It Might Be a Migraine Instead
Given that 88% of self-diagnosed sinus headaches turn out to be migraines, it’s worth seriously considering this possibility, especially if your headaches come and go without the hallmark signs of infection. Ask yourself a few questions: Do your headaches come with nausea, sensitivity to light or sound, or a throbbing quality? Do they happen without a preceding cold? Is your nasal discharge clear rather than colored? Do over-the-counter sinus medications provide little relief?
If you answered yes to several of those, your headaches likely have a neurological origin rather than a sinus one. This distinction matters enormously because migraine responds to entirely different treatments. Years of taking decongestants for what you think is a sinus problem can mean years of unnecessary suffering when targeted migraine therapy could help.
Signs That Need Prompt Attention
Most sinus headaches resolve without complications, but certain symptoms suggest the infection may be spreading or something more serious is happening. A high fever (above 102°F) that doesn’t respond to over-the-counter fever reducers, swelling or redness around an eye, vision changes, a severe headache that comes on suddenly and feels different from anything you’ve experienced before, or a stiff neck alongside your headache all warrant same-day medical evaluation. Sinus infections that spread to surrounding structures, particularly near the eyes or brain, can become serious quickly, though this is uncommon.