Dealing with more than one health condition at once? Here is what you need to know about comorbidities!

Have you ever sat in a doctor office, listened to big medical terms, and felt a little overwhelmed? You are not alone. Doctors use many special words every day. One common term you might hear is comorbidities.

Hearing this word for the first time can feel scary. But once you understand what it means and how it affects your body, you can take charge of your health. Let us break down what this word means in simple, everyday language.

What Are Comorbidities?

Simply put, comorbidities mean you have a main health problem along with one or more other health issues at the same time. The medical word morbidity means having a disease or health problem. When you add the prefix co to it, it simply means two or more health issues exist together.

Hearing this term can make you feel worried. But when you learn what it means, you can partner better with your doctor. Because these extra conditions can interact with each other, your treatment plan might need a few adjustments.

Imagine your doctor tells you to walk every day to manage obesity. A few weeks later, you find out you also have osteoarthritis, which causes joint pain. To protect your joints, you might switch from daily walking to water aerobics. Here, arthritis is a comorbidity that changes how you manage your weight.

Another common example is hypertension, or high blood pressure. People with heart disease or lung conditions often have high blood pressure too. Your doctor will check for these extra issues so they can give you medicine that does not clash with your other treatments.

Knowing about comorbidities helps you talk openly with your medical team. It also helps you understand your care plan and support your loved ones when they face similar health challenges.

Here are a few other terms doctors use to describe these situations:

• Coexisting conditions.
• Associated conditions.
• Multiple chronic conditions.
• Multimorbidity.

Primary Diagnosis Versus Comorbidities.

A comorbidity is a diagnosed health issue that exists right along with your main medical problem, often called a primary diagnosis. Now you might wonder, what is a primary diagnosis anyway? Defining these terms can sometimes feel tricky.

In the medical world, your primary diagnosis is the main health issue you are getting treated for at a specific time. It might be your most serious problem, or the one that needs the most expert care. It could also be the reason you had to stay in the hospital.

Your doctor decides which condition is the primary diagnosis. Depending on which doctor you see and how your health changes, your primary diagnosis might also change.

For example, imagine you have chronic kidney disease, high blood pressure, and type 2 diabetes. You visit a kidney specialist, known as a nephrologist, regularly for your kidneys. That specialist will view your kidney disease as your primary diagnosis. They will view your high blood pressure and diabetes as comorbidities, and they will keep those in mind while treating your kidneys.

Now, take that same example and imagine you visit an endocrinologist to manage your diabetes. That doctor will view diabetes as your primary diagnosis. They will treat your kidney disease and high blood pressure as comorbidities related to your diabetes.

As you can see, what counts as a primary diagnosis or a comorbidity can change based on the situation. Specialists often look at your health through the lens of one main condition and its related comorbidities.

Your primary care provider might look at your health differently. They often take a wider view and use the term multimorbidity to describe your overall health.

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Is Multimorbidity the Same Thing?

The US Department of Health and Human Services defines multimorbidity as having at least two chronic medical conditions that last for a year or longer. This definition does not focus on one main primary diagnosis. That is the main difference between multimorbidity and comorbidities.

Many researchers use the term multimorbidity to study how different diseases interact. Still, many people use comorbidities and multimorbidity interchangeably to describe having two or more health conditions at the same time.

How Do Comorbidities Affect Your Health?

Having comorbidities or multimorbidity can impact your well-being in several ways. When you live with two or more chronic conditions:

• These conditions can team up and put a heavier strain on your physical and mental health than a single condition would. They can also lower your overall quality of life.
• An extra health condition can change your long-term health outlook.
• Managing your care becomes more complex. For example, a treatment for one illness might make another illness worse. Taking many medicines together can also carry risks.
• You may need to see several different medical specialists who must talk to each other to build the best care plan for you.

Common Comorbidities We See.

Comorbidities appear very often among people staying in hospitals and among those managing various health conditions.

Among Hospital Patients.

One study showed that in 2019, more than 84% of older adults in US hospitals had one or more comorbidities alongside the main reason they were admitted. About 50% of this group had at least three comorbidities.

The same study found these common comorbidities:

• High blood pressure, seen in 53.2% of patients.
• Diabetes, seen in 26.4% of patients.
• Chronic lung disease, seen in 20.5% of patients.
• Deficiency anemias, seen in 18.0% of patients.
• Obesity, seen in 17.0% of patients.
• Kidney disease and failure, seen in 16.3% of patients.

The study also highlighted two key trends:

• Comorbidities increase with age. Only about 8% of young adults aged 18 to 24 had three or more comorbidities. In contrast, about 73% of adults aged 85 and older had three or more.
• Comorbidities affect hospital outcomes. Patients with three or more comorbidities stayed in the hospital longer and faced a higher risk of passing away during their stay. This risk is especially high for surgeries. Patients with three or more comorbidities had an in-hospital death rate after surgery that was eight times higher than those with no comorbidities.

Comorbidities Linked to Specific Main Conditions.

Researchers often study people with a specific condition, such as arthritis or heart failure, to see what extra health problems they tend to have. Every person is unique, and these studies do not mean everyone with a certain illness will develop extra conditions. However, they do show common patterns.

Here are a few examples:

• Attention-Deficit/Hyperactivity Disorder (ADHD): Often occurs alongside depression, anxiety disorders, and bipolar disorder.
• Type 2 Diabetes: Often occurs alongside high blood pressure, high cholesterol, high triglycerides, fatty liver disease, polycystic ovary syndrome (PCOS), obesity, and obstructive sleep apnea.
• Heart Failure: Often occurs alongside type 2 diabetes, sleep apnea, obesity, and high blood pressure.

Sometimes, conditions happen together because they share the same root causes or risk factors. For example, high blood pressure and diabetes both raise your risk for heart disease and kidney disease. Other times, conditions may not share a direct link. Your doctor can explain the specific causes behind your health conditions and how your treatments help.

Why Staying Informed Matters.

Learning what words like comorbidities and multimorbidity mean helps you talk more easily with your doctor. If these medical terms feel confusing, pause and take a deep breath.

The most important goal is not to memorize medical words. The true goal is to take time to learn about your health conditions and how they affect your body. You want to understand what treatments you need, why you need them, and how to manage your medicines at home. It is also vital to remember that two people with the exact same condition can experience very different symptoms.

Always share every question and worry with your doctor. That way, they can give you guidance tailored specifically to your unique health needs.

A Comparison of Health Terms.

To make things clear, here is a quick guide comparing these key health concepts: