When “I’m Always Sick” Might Be an Immune Deficiency: Signs to Watch and What Testing Looks Like

Everyone gets sick sometimes. Colds happen. Kids bring home germs. Work gets stressful, sleep gets messy, and your body feels it. That’s normal. But there’s a point where "I’m always sick" stops sounding like a rough season and starts sounding like a pattern.

If you feel like you’re constantly battling infections, needing antibiotics over and over, or never fully bouncing back, it’s fair to wonder whether your immune system is struggling. Immune deficiencies are not the most common explanation, but they’re important enough that you don’t want to miss the signs, especially if infections are frequent, severe, or unusually hard to clear.

If you’re thinking, "This sounds like me," an allergist/immunologist can help sort out what’s normal and what needs a deeper look. Dr Basaran is one option through Ohio ENT & Allergy Physicians for immunology evaluation and immune deficiency workups.

First: what is an immune deficiency?

Your immune system is a network of cells, antibodies, and organs that fight off infections. An immune deficiency (also called immunodeficiency) means one part of that system isn’t working as effectively as it should. That can make it easier to get infections, harder to clear them, or more likely that infections become complicated.

There are two broad categories:

• Primary immune deficiencies: Usually genetic and often present earlier in life, though some are diagnosed in adults.

• Secondary immune deficiencies: Caused by other factors, like certain medications, underlying conditions, or severe chronic stressors.

And here’s the important nuance: having frequent infections doesn’t automatically mean you have an immune deficiency. But certain patterns raise the odds and deserve evaluation.

Signs and red flags to watch for

Think less about "how often do I get sick?" and more about "what kind of sick and how does it behave?"

Red flags that suggest you should get checked

• Frequent infections that keep coming back, especially sinus infections, ear infections, bronchitis, or pneumonia

• Infections that are unusually severe or require hospitalization

• Infections that don’t respond well to normal treatment or need multiple rounds of antibiotics

• Chronic sinus problems with recurring thick drainage, congestion, and pressure

• Repeated pneumonia or serious chest infections

• Unexplained weight loss, persistent fatigue, or fevers alongside frequent infections

• Family history of immune deficiency or unusual recurrent infections

• Poor wound healing or frequent skin infections

For kids, frequent ear infections or persistent respiratory infections can be common, but if it’s happening constantly, especially with complications, it’s worth investigating.

A few "it might not be immune deficiency" situations

Sometimes the immune system is fine, and the real issue is:

• Allergies that cause chronic congestion and inflammation (making infections easier)

• Asthma or chronic airway irritation

• Structural issues in the nose/sinuses

• Exposure patterns (daycare, school, crowded work environments)

• Sleep deprivation and high stress

• Reflux (which can mimic respiratory problems)

That’s why a proper evaluation matters. You don’t want to self-diagnose. You want to rule things in or out intelligently.

What an evaluation usually looks like

An immunology visit typically starts with a detailed history. This is honestly one of the most valuable parts.

You may be asked about:

• How many infections you get per year

• What type (sinus, ears, lungs, skin)

• How long they last

• Whether you needed antibiotics, steroids, or ER visits

• Whether you’ve had pneumonia and how often

• Vaccine history and how you respond to vaccines

• Family history and any underlying conditions

A specialist is looking for a pattern that matches immune dysfunction rather than "bad luck" or a rough exposure season.

Common tests used to check immune function

Testing varies by your situation, but here are common categories.

1. Basic bloodwork

Often includes:

• Complete blood count (CBC) to look at white blood cells and immune cell patterns

• Quantitative immunoglobulins (IgG, IgA, IgM) to see if antibody levels are low

These tests can flag major issues quickly. But normal results don’t always end the story.

2. Specific antibody responses

This is a key part many people don’t know about. You might have "normal IgG" overall, but still not make strong antibodies to certain infections.

A clinician may check:

• Antibody levels to vaccines you’ve already had (like pneumococcal or tetanus)

• Sometimes a "before and after" vaccine response, to see how well your body produces protective antibodies

This helps determine whether the immune system is producing functional protection, not just "normal-looking" numbers.

3. Additional immune system tests (if needed)

Depending on your case, testing may include:

• Subclasses of IgG

• Complement system testing

• Lymphocyte subset testing (T cells, B cells, NK cells)

Not everyone needs these. A good clinician escalates testing based on evidence, not as a fishing expedition.

What happens if something looks abnormal?

If results suggest an immune deficiency, the next step is usually a tailored plan based on severity and your infection pattern.

That can include:

• Preventive strategies to reduce infection risk

• Treating underlying contributors (allergies, asthma, sinus inflammation)

• Targeted vaccinations

• In some cases, preventive antibiotics

• In certain diagnosed conditions, immunoglobulin replacement therapy may be discussed

The point isn’t to label you. It’s to reduce the infection cycle and protect your health long-term.

When to book an immunology visit

If any of these are true, it’s reasonable to stop waiting and get evaluated:

• You’re on your third or fourth "sinus infection" in a year

• Antibiotics keep becoming a repeat storyline

• You’ve had pneumonia, especially more than once

• Your symptoms are interfering with school/work and quality of life

• You’ve been told "everything looks normal," but you’re clearly not okay

If you’re ready to get clarity on why you’re getting sick so often and what testing makes sense, you can start with Dr Basaran. Because maybe it’s just a tough year. Or maybe it’s something fixable that no one has properly looked into yet. Either way, it’s worth knowing.

The Chief editor here at Billboard Health, wife and Mother of 1, Nutritionist and goal getter.