© Shutterstock

Sinus infection -

A sinus infection is the inflammation of the nasal passages, caused by bacteria.

© Shutterstock

What it feels like -

Sinus congestion can result in an aching sensation and a feeling of fullness in the middle of your face. The sinus pressure, or headache, worsens when you lean forward or lie down.

© Shutterstock

What triggers it -

Bacteria or viruses trigger sinus infections. They're also caused by colds, allergies, and asthma.

© Shutterstock

How long it lasts -

Usually, sinus infections clear up on their own, but some might require medication. If it lasts longer than seven to 10 days, then you may be prescribed with antibiotics.

© Shutterstock

Common cold -

A common cold is a viral infection, which affects your nose and throat.

© Shutterstock

What it feels like -

With a common cold, you'll experience a stuffy and runny nose. You should also expect a sore throat and headaches, as well as coughing and sneezing. Colds can also trigger a fever.

© Shutterstock

What triggers it -

A cold is the result of viruses that cause inflammation of the membranes that line the nose and throat. It can result from one of more than 200 different viruses.

© Shutterstock

How long it lasts -

The cold virus usually goes away without treatment within seven to 10 days. But if the symptoms linger for longer, then you might have sinusitis.

© Shutterstock

Allergies -

An allergy is an inflammation of the nasal passages, caused by exposure to allergens, such as pollen.

© Shutterstock

What it feels like -

Nasal congestion is a common allergy symptom. It's usually accompanied by a runny nose, sneezing, and an itchy nose and eyes. Keep in mind that allergies never cause a fever.

© Shutterstock

What triggers it -

Allergic reactions are caused by allergens. Common indoor allergens include mold, dust, and animal dander. Outdoor triggers include pollen and ragweed.

© Shutterstock

How long it lasts -

If you have seasonal allergies, then your symptoms kick in throughout the spring and fall. If you're allergic to indoor allergens, you may experience symptoms year round.

© Shutterstock

How to treat congestion -

Because these conditions share some similar symptoms, such as congestion, medications like nasal sprays, oral antihistamines, and eye drops can help minimize your discomfort.

© Shutterstock

Rest -

One of the best ways to help clear up viral infections include getting as much rest as you can.

© Shutterstock

Continue taking allergy meds -

And if you're on allergy meds, continue taking them as you normally would. They can be helpful for suppressing some symptoms.

© Shutterstock

Drink clear fluids -

Clear liquids, such as water and broth, are the best when you have a cold and sinus infection. This is because it helps lubricate the mucous membranes of the throat.

© Shutterstock

In case of allergies -

When it comes to allergies, do your best to avoid your triggers and potential irritants. But there are also treatments with antihistamines and immunotherapy.

© Shutterstock

When should you consult an allergist? -

Consider seeing an allergist if you have prolonged and severe symptoms, asthma, and recurring sinus and ear infections.

© Shutterstock

When colds and allergies cause sinus infections -

When people have colds or allergies, the lining of the nose swells up. This prevents mucus from draining properly, which can then lead to sinusitis.

© Shutterstock

Allergies and sinusitis -

People with allergies or asthma may be more vulnerable to sinusitis, because the airways are more likely to become inflamed.

© Shutterstock

Prevent sinus infections -

If you're at higher risk for sinus infections, don't let allergy symptoms spiral out of control. Treat it promptly, and also take steps for prevention.

© Shutterstock

Are sinus infections contagious? -

The answer is no. Since they form inside the nose and not through an outside infection, bacterial sinus infections are not contagious.

© Shutterstock

When to see a doctor -

However, when it comes to sinus infections, if your symptoms worsen or last longer than two weeks, then you should see a doctor for relief.

© Shutterstock

Prevention -

Luckily, there are prevention methods. Help your immune system fight off viruses and infections by doing the following...

© Shutterstock

Get enough sleep -

Protect your immune system by getting enough sleep. Most adults need at least seven hours of sleep per night.

© Shutterstock

Maintain a healthy diet and weight -

This one is always a good reminder. Diets heavy in fruits, vegetables, and whole grains, and that are low in saturated fat, are the best.

© Shutterstock

Keep your hands clean -

Make sure to wash your hands with soap and water to kill any bacteria. When that's not possible, use a hand sanitizer.

© Shutterstock

Stop smoking -

Smoking lowers the body's immune response and makes it more vulnerable to viruses, as well as other serious diseases.

© Shutterstock

Drink plenty of fluid -

Alcohol and caffeine don't count! Dryness is the number one enemy of a healthy respiratory system. Make sure to drink plenty of water.

See more: Halotherapy: how salt can help you cure some health problems

© Shutterstock