Allergies happen as a result of an overactive immune response that results in mast cells producing high levels of histamine. Meanwhile, sinus infections (also called sinusitis) are an inflammation of the sinuses, often following an infection or allergic reaction. 

Allergies can be either seasonal or year-round, depending on the individual’s specific allergen sensitivities and their environment. Sinus infections, however, can be acute or chronic. Acute sinus infections will typically resolve in under 10 days, while chronic sinus infections will typically last for more than 12 weeks. 

Causes of allergies

Allergies can be caused by a wide variety of substances; with pollen, dander, and food items being among the most common categories. Some common allergens include: 

• Grass pollen;

• Tree pollen;

• Weed pollen;

• Pet dander;

• Dust mites;

• Mold;

• Insect bites and stings;

• Latex;

• Milk;

• Shellfish;

• Nuts.

Causes of sinus infections

Underlying conditions that can cause a sinus infection can include:

• Allergies;

• Viral infections;

• Bacterial infections;

• Fungal infections;

• Nasal polyps;

• Deviated septum.

However, it is important to keep in mind that a wide range of conditions and external elements can cause allergic reactions and sinus infections as well. As such, it is important to consult a medical professional if the condition persists. 

Symptoms of allergies and sinus infections

The symptoms of allergies and sinus infections are very similar and can include the following.

Risk factors

The chance of developing either allergies or sinus infections can be increased through a variety of pre-existing risk factors. The most notable risk factors are genetics, demographics, and medical history. 

Genetics

Genetic background is the most significant factor that dictates the risk of developing allergies. Someone with a history of allergies in their family is at higher risk of developing allergies themselves.

Genetics can also play a role in the risk of developing sinus infections. For example, a family history of allergies, autoimmune disorders, or nasal polyps may indirectly increase an individual’s risk of developing sinus infections.

Demographics

Demographic factors including sex, race, and age can also affect the likelihood of developing allergies. For example, Caucasians are more likely to develop allergies than Asians, and children are more likely to develop allergies than adults.

Because allergies can cause sinus infections, demographic factors that increase the chance of developing allergies can also increase the risk of developing sinus infections. 

Meanwhile, older adults are at higher risk of developing other underlying conditions like nasal polyps and various infections. Even factors like income and location can affect the risk of developing sinus infections, as these factors could limit a person’s access to diagnostic and preventative options.

Personal medical history

In addition, individuals who suffer from conditions such as allergies and asthma are more likely to suffer from sinus infections. Similarly, a tendency to develop other infections, such as ear infections, can significantly increase the risk of developing sinus infections. 

Less commonly, growths such as polyps and tumors in the sinuses are a significant risk factor for chronic sinus infections.

Diagnostic options

While understanding how the symptoms of allergies and sinus infections can help concerned individuals identify a problem and determine what steps they may need to take next, it is best to see a doctor for an official diagnosis. 

Diagnostic options may differ based on a variety of factors, such as the individual’s medical history, the severity of their condition, and their response to previous diagnostic efforts. 

Review of symptoms

A doctor may be able to determine that a patient has an allergy based on a discussion of the symptoms and triggers. For example, if a patient reports that they suffer from nasal congestion and itchy, watery eyes around the springtime, their doctor may prescribe them an antihistamine and observe how the patient’s symptoms respond. 

If symptoms persist, the doctor may discern the severity of the symptoms and infer that there is a different condition causing or exacerbating the symptoms, such as a sinus infection.

Types of testing

In cases where the cause of allergies is unclear or the symptoms are severe, a doctor may refer the patient to an allergist for further testing. Skin tests are the most common method, which involves the pricking of the skin and exposing it to possible allergens to see what the patient’s skin reacts to. If this is ineffective, the allergist may conduct a blood test instead.

Sinus infections can be diagnosed with imaging tests or with samples of the tissue. An imaging test can show any telltale swelling in the sinuses, while a tissue sample can reveal the underlying cause of infection, such as certain strains of bacteria. 

Relief and treatment options

In some cases, allergy symptoms can be effectively treated at home. However, if the symptoms are severe or persistent, a doctor may explore additional treatment options. 

Meanwhile, sinus infections will often require medical intervention, as effective treatment typically revolves around addressing the underlying condition(s) that are causing the infection. Additionally, a doctor may need to prescribe antibiotics.

Home treatment

One of the most basic options for treating allergies at home includes avoiding allergy triggers and utilizing over-the-counter allergy medication, such as nasal sprays and oral antihistamines. 

That being said, while the symptoms of a sinus infection can be addressed at home in the short term by using over-the-counter medications like antihistamines or anti-inflammatories, medical intervention will be key for a full and speedy recovery.

Medical intervention

In some cases, home treatment may not be enough to effectively treat severe or persistent allergies. In such cases, a doctor may prescribe a different medication or may schedule immunotherapy treatment. 

Sinus infections are treated by addressing the underlying condition. A doctor may prescribe antibiotics, antiviral medications, or antifungal medications, as appropriate. Meanwhile, other underlying conditions may require surgical intervention. 

Preventing allergies

Potential options for preventing allergic reactions include:

• Avoid known allergy triggers;

• Seal windows and doors;

• Use an air filter;

• Use preventative medicines like inhalers and over-the-counter medications;

• Regularly wash hands;

• Check weather reports for the pollen count;

• Thoroughly clean living spaces;

• Regularly brush and bathe pets;

• Use bug repellant;

• Use screens to keep out bugs.

Preventing sinus infections

Potential options for preventing sinus infections include:

• Antihistamine medications;

• Avoidance of allergens;

• Healthy diet and exercise;

• Getting recommended vaccinations;

• Good hygiene practices.

However, preventative measures alone are not always sufficient. In some cases, preventative measures and treatment options will need to be used in conjunction to manage chronic conditions. 

When to see a doctor

If symptoms persist over a long period or cause severe issues such as difficulty breathing, it is important to consult a doctor. Furthermore, if treatment options fail to appropriately address the symptoms, the prescribing doctor should be informed so that they can reassess the condition and adjust the treatment. 

It is also important to keep in mind that even if the treatment initially works well, it may need adjustments over time. 

Other similar conditions

There are many other conditions that can present symptoms similar to allergies and sinusitis. Viral infections such as cold or influenza can mimic many symptoms such as nasal congestions, cough, sore throat, and fatigue. 

Chronic headaches are another condition that can easily be mistaken for allergies or sinusitis, particularly when they are localized to the sinuses. As such, individuals who are experiencing severe or persistent symptoms should seek out the help of a medical professional to correctly diagnose and treat the condition. 

Schedule your appointment with a HealthTap online doctor today