A Guide to Allergies vs. Sinus Infections and When to See a Doctor

Allergies vs. sinus infection symptom comparison

Allergies and sinus infections can both cause symptoms that affect your nose and face. There are some telltale symptoms that might help you differentiate between the two. For instance:

• Allergies usually cause itchy, watery eyes, which is rare in sinusitis.
• Sinus infections cause sinus inflammation, which can be noticeable and lead to pain, pressure, and tenderness around the eyes, cheeks, and forehead.

Allergy symptoms will also get better when you limit contact with the trigger, while sinus infection symptoms can take up to 2 weeks to improve.

However, you may often experience other symptoms, and it’s possible to have both conditions simultaneously.

Compare the following symptoms to see if you might have allergies or a sinus infection.

Allergy symptoms

Symptoms of allergies are caused by an adverse reaction to a substance, such as pollen or dust mites. Your immune system responds by releasing a chemical called histamine, which can then cause symptoms.

According to the Allergy and Asthma Network, the most common symptoms of allergies include:

• sneezing
• itchy, watery, or swollen eyes
• itchy, stuffy, or runny nose
• itchiness that affects the eyes, nose, or roof of the mouth
• facial swelling, which can affect the lips and tongue
• itchy skin
• skin rashes and hives
• coughing
• wheezing
• shortness of breath
• headache

In severe cases, you may experience anaphylaxis, which can be a life threatening condition. Untreated allergies can also lead to sinus infections.

Sinus infection symptoms

A sinus infection occurs when the nasal passages become inflamed due to a viral infection. This inflammation prevents mucus from draining properly, allowing it to accumulate.

Common symptoms of sinusitis may include:

• facial inflammation, tenderness, or pain
• nasal congestion
• runny nose
• difficulty smelling
• discolored nasal discharge
• fever
• bad breath
• tooth pain

When to connect with a doctor

You don’t always need to connect with a healthcare professional for allergies or sinusitis.

In many cases, a pharmacist can recommend over-the-counter (OTC) medications for symptom relief, such as antihistamines for allergy symptoms or nasal decongestants for sinusitis.

However, consider speaking with a healthcare professional if your symptoms don’t improve or worsen after 1 week of taking OTC medications, or if you continue to experience allergy or sinusitis symptoms.

A person should get immediate medical treatment if they experience any symptoms of anaphylaxis, such as:

• sudden facial swelling, such as the tongue or throat
• difficulty breathing
• blue, pale, or gray lips or skin
• sudden confusion, dizziness, or faintness

A healthcare professional can help develop an appropriate treatment plan tailored to your specific symptoms.

How are allergies and sinus infections treated?

Treatment for allergies and sinus infections may share similarities in managing symptoms.

For instance, a doctor may recommend using a nasal decongestant or a saline spray to help break up mucus in your nasal cavities to relieve congestion.

Allergy treatments

The best way to treat and prevent allergies is to avoid the trigger, if possible.

A healthcare professional may also recommend OTC antihistamines to help manage symptoms like itchiness or corticosteroid drugs to help manage mild to moderate inflammation.

In severe cases, you may need to use an adrenaline auto-injector, such as an EpiPen, or get immunotherapy.

The type of treatment you need will depend on the frequency, duration, and severity of your symptoms.

Sinus infection treatments

Sinusitis is usually caused by a viral infection, for which antibiotics are ineffective. Some ways to help manage sinusitis symptoms include:

• getting plenty of rest
• drinking plenty of fluids, such as water, broth, and herbal tea
• trying steam inhalation therapy
• applying warm compresses to your forehead

If a doctor suspects that your sinus infection is caused by bacteria, they may prescribe an antibiotic. You’ll need to take the full prescription, even if you start feeling better within a day or two.

How to prevent allergies and sinus infections

You can help prevent a sinus infection in the same way as you would prevent catching cold and flu viruses, including regularly washing your hands and staying up to date with recommended vaccines.

You can’t, on the other hand, fully prevent allergies. The best way is to avoid the substances you know you’re allergic to as often as you can.

For example, if you have seasonal allergies to pollen, avoid going outdoors when the counts are at their highest.

A healthcare professional can also recommend some preventive medications or allergy shots, if you’re a good candidate.

The bottom line

Allergies and sinus infections can have similar symptoms, such as a stuffy nose.

However, two key differences are that allergies may cause itchy, watery eyes, while sinusitis is more likely to cause sinus inflammation, pain, and feelings of pressure.

Another difference is the timeline. Allergies can be chronic or seasonal, but avoidance and medication can help alleviate your symptoms. A sinus infection typically improves within 1 to 2 weeks.

Speak with a healthcare professional if your symptoms don’t improve with OTC medications or worsen. They can help develop an appropriate treatment plan tailored to your specific condition.