Sinus infection: symptoms, treatment, and when to see a doctor

The timeline is the answer. A cold peaks around day three to five and is clearly improving by day ten. A bacterial sinus infection is likely in one of three patterns: symptoms last more than 10 days without any improvement; symptoms are severe from the start, meaning a fever of 39 C (102 F) or higher with thick colored discharge or face pain for 3 to 4 days in a row; or symptoms get better and then clearly get worse again, which doctors call double worsening. Everything else, including green mucus, facial pressure, and congestion, happens with ordinary viral colds too and does not tell them apart. So the single most useful thing you can do is note when the illness started and whether the overall trend is improving.

Usually not. The large majority of sinus infections are viral, follow a cold, and clear on their own within 10 days; antibiotics do not speed that up and carry side effects. Antibiotics enter the picture only when the pattern fits bacterial sinusitis: more than 10 days without improvement, a severe onset with high fever and face pain for 3 to 4 days, or double worsening. Even then, guidelines support watchful waiting with symptom relief for many otherwise healthy adults, reserving antibiotics for cases that are severe or still worsening after several more days. Taking antibiotics for a viral illness does nothing for the illness and contributes to resistance, so the goal is matching treatment to the pattern, not treating the color of the mucus.

A sinus infection causes a stuffy or runny nose with thick yellow or green mucus, pressure or pain in the face, around the eyes, cheeks, or forehead, that is often worse when you lean forward, post-nasal drip, a reduced sense of smell, cough that is worse at night, bad breath, fatigue, and sometimes fever. Teeth in the upper jaw can ache too, which surprises people. The important caveat is that this whole list also occurs with a viral cold, which is by far the most common cause. Symptoms alone cannot separate viral from bacterial; the timeline does that. Symptoms under 10 days and trending better point viral, while past 10 days without improvement, severe onset, or worsening after improvement points bacterial.

A viral sinus infection, which is most of them, improves within 10 days even though congestion can linger a bit. When symptoms pass 10 days with no improvement, bacterial sinusitis moves up the list, and untreated bacterial cases can drag on for weeks; antibiotics shorten the course once it is genuinely bacterial. Recurrent episodes that clear fully between bouts are usually separate viral illnesses rather than one long infection. Symptoms lasting 12 weeks or more meet the definition of chronic sinusitis, which is a different problem with different treatment and deserves a doctor's workup, sometimes including allergy testing or imaging. As a practical rule, anything still going at the two-week mark without a clear improving trend is worth a consultation rather than more waiting.

Book a consultation when symptoms last more than 10 days without improving, when they are severe from the start with a high fever and face pain for 3 to 4 days straight, when they improve and then get clearly worse again, or when sinus infections keep coming back several times a year. Also get seen if over-the-counter symptom relief is not touching the pain or fever. Seek urgent in-person care for swelling or redness around an eye, vision changes or double vision, a severe headache unlike your usual, a stiff neck, confusion, or trouble staying awake. Those signs suggest the infection is spreading beyond the sinuses, which is rare but serious. For everything short of that, a text consult can usually sort out whether you need antibiotics, home care, or a visit.

Most sinus infections are viral, and home care is the treatment. Saline nasal rinses once or twice a day clear mucus and are the single most useful step. A steroid nasal spray reduces inflammation and helps congestion and pressure; it takes a few days to reach full effect. Acetaminophen or ibuprofen handles pain and fever, warm compresses ease facial pressure, and fluids, rest, and sleeping with your head raised all help drainage. Decongestant sprays like oxymetazoline work well for severe congestion but should not be used more than 3 days in a row, because longer use causes rebound congestion that is worse than the original. Antihistamines are not helpful for a typical sinus infection. If you are doing all of this and not improving past day 10, that is the point to get evaluated.