You should go to the ER for a sinus infection if you experience severe symptoms like vision changes, extreme swelling around the eyes, stiff neck, confusion, seizures, trouble breathing, or neurological changes (slurred speech, loss of coordination), as these suggest the infection is spreading and becoming a serious complication like meningitis or brain abscess. Go immediately if you have severe pain, high fever (over 103°F/40°C), or difficulty thinking clearly.
Warning signs you should never ignore
See a healthcare provider if you have:
Severe facial or head pain: Intense pain or pressure that is difficult to manage. High fever: If your temperature exceeds 102°F (39°C) and does not respond to medication. Eye-related symptoms: Swelling or redness around the eyes, severe eye pain, or changes in vision.
Yes, a sinus infection (sinusitis) can absolutely cause nausea, primarily through post-nasal drip irritating the stomach and from the intense pressure and inflammation leading to headaches and dizziness, which in turn trigger queasiness. This happens when excess mucus drains down the throat, upsetting the stomach lining, and sinus pressure affects balance, leading to nausea or even vomiting.
You may need antibiotics if your symptoms last more than 10 days without improving, if they get worse after getting better, or if they start out severe like high fever and facial pain. Your doctor can help you decide. Can you be hospitalized for a sinus infection? Yes, but it's rare.
To treat a sinus infection while pregnant, focus on safe home remedies like saline nasal rinses, steam inhalation, warm compresses, and staying hydrated, while using acetaminophen for pain and resting; always consult your doctor before taking any medication, especially avoiding NSAIDs (like ibuprofen) and oral decongestants, as some treatments are unsafe during pregnancy.
Sinusitis red flags signal a severe infection needing urgent care, including severe eye symptoms (swelling, redness, vision changes like double vision), high fever, stiff neck, confusion, severe facial swelling/numbness, or neurological changes (difficulty walking/talking), indicating potential spread to the eyes or brain. For less severe cases, seek care if symptoms last over 10 days, worsen after improving ("double sickening"), or include severe facial pain/toothache, suggesting bacterial sinusitis.
The main difference between COVID-19 and a sinus infection is what causes them. A sinus infection is caused by inflammation of the sinuses and often follows a cold or allergy flare-up. COVID-19 is only caused by the SARS-CoV-2 virus.
See a GP if:
You, or a child, have sinusitis symptoms and: you do not get better after 7 days of treatment from a pharmacy or GP. you do not get better after 3 weeks of treating symptoms yourself. you keep getting sinusitis.
It's not common. But a serious sinus infection can spread to the membranes and fluid around the brain and spinal cord. The infection is called meningitis. Other serious infections can spread to the bones, called osteomyelitis, or to skin, called cellulitis.
ANSWER: Allergies and sinus infections often are mistaken for one another. But they are two separate conditions. By paying close attention to the specific symptoms you have, you can usually identify which one is more likely to be causing the problem.
A sinus infection can lead to abscess formation
Severe cases can cause sepsis, a life-threatening response to an infection that will require urgent medical care.
Germs that enter the bloodstream and travel to the brain and spinal cord cause bacterial meningitis. But bacterial meningitis also can happen when bacteria directly enter the meninges. This may be caused by an ear or sinus infection or a skull fracture.
Physical Symptoms
Sinusitis can cause ischemic stroke due to compressive stenosis of the paraclinoid ICA, particularly in patients with CdLS. Sinusitis should be preferentially managed in patients with CdLS.
The four main symptoms of sinusitis are nasal congestion/blockage, facial pain/pressure, thick, discolored mucus (yellow/green), and a reduced sense of smell or taste, often accompanied by a cough, postnasal drip, and fatigue, making it hard to breathe and causing discomfort around the eyes, cheeks, and forehead.
Common New COVID Variant Symptoms in 2025
However, if you have some or all of the following symptoms, it is very likely you have a sinus infection:
Acute sinusitis symptoms often include: Thick, yellow or greenish mucus from the nose, known as a runny nose, or down the back of the throat, known as postnasal drip. Blocked or stuffy nose, known as congestion. This makes it hard to breathe through the nose.
The ENT inserts a tiny tube with a small balloon on the en into your nose. The balloon is placed at the source of the blockage and then inflated to help open the passageway, allowing your sinuses to drain properly.
It's important to clarify that sinus inflammation itself rarely spreads directly to chest organs. Rather, chest symptoms related to sinus allergies result from secondary processes—for example, post-nasal drip, coughing, or airway irritation.
Aromatherapy. Aromatherapy is a great home remedy and natural treatment for sinus infections. Using eucalyptus, peppermint or other scents can possibly help open up the respiratory tract. These essential oils can be put into some home humidifiers, or used in a hot shower, which diffuses the scent.
Is the Fetus Affected? A sinus infection by itself has a low chance of harming the developing fetus. It is worth noting, however, that in rare circumstances, symptoms can result in complications. Being pregnant may also impact how severe the sinus infection symptoms are.
Untreated chronic sinusitis can lead to long-term effects such as nasal congestion, thick nasal discharge, facial pressure, and a reduced sense of smell. These ongoing symptoms can be quite debilitating, impacting daily life, sleep quality, and overall well-being.