A true sinus headache causes deep, constant pressure around your forehead, cheekbones, or the bridge of your nose, and it almost always comes alongside signs of a sinus infection like thick discolored nasal discharge and sometimes fever. But here’s what most people don’t realize: roughly 88% of people who believe they have sinus headaches actually have migraines. Understanding the full picture of symptoms helps you figure out which one you’re dealing with.
Where the Pain Shows Up
Sinus headache pain follows the geography of your sinuses. You’ll feel pressure and aching across your forehead (above the eyebrows), in your cheekbones, or around the bridge of your nose. The pain tends to feel deep and steady rather than throbbing or pulsing. It often affects both sides of your face, though it can be worse on one side if only one sinus cavity is blocked.
One hallmark feature is that the pain gets noticeably worse when you bend forward or move your head suddenly. Lying down also tends to intensify it. This happens because shifting positions changes the pressure inside your blocked sinus cavities, pushing inflamed tissue against the surrounding bone and nerves.
Nasal and Facial Symptoms
A real sinus headache doesn’t happen in isolation. It’s driven by a sinus infection, so you’ll have clear signs of one. The most telling is thick, yellow or greenish mucus draining from your nose or down the back of your throat (postnasal drip). A runny nose with clear, watery discharge points more toward allergies or migraine than a sinus infection.
You’ll likely also notice a stuffy nose, reduced sense of smell, and a feeling of fullness or swelling in your face. Your voice may sound muffled or nasal. Some people feel tenderness when pressing on the skin over their cheekbones or forehead.
Tooth Pain and Other Surprising Symptoms
Upper tooth pain is a fairly common symptom that catches people off guard. The largest pair of sinuses sit directly above the back teeth of your upper jaw, and the roots of those teeth are so close to the sinus floor that they sometimes extend into the sinus cavity itself. When inflammation builds up in the sinus, it puts pressure on those roots, creating a toothache that can feel identical to a dental problem. If several upper back teeth hurt at once and you also have nasal congestion, your sinuses are the likely culprit rather than a cavity.
Other symptoms that often accompany a sinus headache include a low-grade fever, fatigue, and ear pressure or fullness. Bad breath is common too, caused by infected mucus draining into the throat.
How Long Symptoms Last
The timeline depends on whether you’re dealing with acute or chronic sinusitis. Acute sinus infections, and the headaches that come with them, last less than four weeks and typically improve with treatment. Most people start feeling better within 7 to 10 days.
Chronic sinusitis involves repeated infections with symptoms persisting for 12 weeks or longer. In this case, the headache and facial pressure may come and go in waves or remain as a low-level constant presence. The pain tends to be less intense than acute sinusitis but more wearing over time.
Why It’s Probably a Migraine
A landmark study found that 88% of patients who had been told they had sinus headaches, either by self-diagnosis or by a physician, actually met the clinical criteria for migraine. This isn’t a small overlap. It’s the majority.
The confusion exists for good reason. Migraines can cause facial pressure, forehead pain, nasal congestion, and even a runny nose. The nervous system activates the same nasal pathways during a migraine that get triggered during a sinus infection, producing convincing sinus-like symptoms. The International Classification of Headache Disorders specifically warns that both migraine and tension headaches are commonly mistaken for sinus headaches because of this symptom overlap.
The key difference comes down to what else is happening. A true sinus headache includes thick yellow or green nasal discharge and other signs of infection. Migraines are more likely to involve nausea, sensitivity to light or sound, and throbbing pain that pulses with your heartbeat. If you get recurring “sinus headaches” without colored discharge or fever, especially if over-the-counter decongestants don’t help, you’re likely dealing with migraines.
How to Tell the Difference at Home
- Nasal discharge color: Yellow or green mucus suggests infection and a true sinus headache. Clear or watery discharge points toward migraine or allergies.
- Light and sound sensitivity: These are migraine hallmarks and rare with sinus infections.
- Nausea: Common with migraines, uncommon with sinusitis.
- Fever: A low-grade fever supports a sinus infection. Migraines don’t cause fever.
- Pattern: Recurring headaches in the same location, especially around menstrual cycles or weather changes, are more consistent with migraine.
Symptoms That Signal Something Serious
In rare cases, a sinus infection can spread to surrounding structures, including the brain. This is uncommon but requires immediate emergency care. Warning signs include a sudden high fever, a stiff neck, vision changes, difficulty speaking or hearing, muscle weakness or sensation changes on one side of the body, personality changes, or seizures. These symptoms suggest the infection has moved beyond the sinuses and needs urgent treatment.