This section offers clear, accessible explanations of a variety of chronic and invisible illnesses. Each condition is paired with a brief description that reflects what living with it may be like. We’ve left out complicated medical jargon, focusing instead on simple, straightforward language—so you can better understand your own diagnosis or gain insight into someone else’s. Our goal is to encourage understanding, empathy, and respect. 

Asthma

Asthma is a condition that affects the airways — the tubes that carry air in and out of the lungs. In asthma, these airways can become swollen and narrow, making it harder to breathe. This can happen when something triggers the asthma, such as allergies, exercise, cold air, or respiratory infections. Common symptoms include coughing, wheezing, shortness of breath, and a feeling of tightness in the chest. Asthma can range from mild to more severe, and symptoms can come and go. While there’s no cure, asthma can be managed with inhalers, medications, and avoiding triggers.

Attention Deficit/Hyperactivity Disorder

Attention-Deficit/Hyperactivity Disorder (ADHD) is a difference in how the brain focuses, manages energy, and controls impulses. People with ADHD may find it harder to pay attention for long periods, stay organized, or sit still — or they may have bursts of energy and creativity that others don’t. Common traits can include being easily distracted, feeling restless, forgetting details, or acting on ideas quickly. ADHD can look different from person to person, and it’s not about laziness or lack of ability — it’s simply a different way of thinking and processing information.

Autism Spectrum Disorder 

Autism Spectrum Disorder (ASD) is a developmental difference that affects how a person experiences the world, communicates, and interacts with others. Because autism exists on a spectrum, it can look different for each individual — some people may need more daily support, while others may be highly independent. Common traits can include differences in social communication, unique ways of learning or problem-solving, focused interests, and sensitivity to certain sounds, lights, or textures. Autism is simply a different way of thinking and processing the world, and it’s not something that needs to be “fixed.” 

Celiac Disease

Celiac disease is a condition where the immune system reacts to gluten — a protein found in wheat, barley, and rye. When someone with celiac disease eats gluten, their immune system mistakenly attacks the small intestine, which can make it harder for the body to absorb nutrients from food. Common symptoms can include stomach pain, bloating, diarrhea or constipation, fatigue, and weight changes, but some people have no obvious symptoms at all. Celiac disease is managed by following a strict gluten-free diet, which allows the intestine to heal and helps prevent symptoms.

Complex Regional Pain Syndrome

Complex Regional Pain Syndrome (CRPS) is a condition that causes ongoing pain, usually in one arm or leg, after an injury, surgery, or sometimes without a clear cause. With CRPS, the nervous system sends pain signals that are stronger or last longer than they should, and the affected area can become very sensitive. Common symptoms can include burning or throbbing pain, swelling, changes in skin color or temperature, and stiffness. CRPS can range from mild to more severe, and symptoms may change over time. While there’s no single cure, treatments like physical therapy, medications, and pain management strategies can help reduce symptoms and improve movement.

Dysautonomia

Dysautonomia is a condition that affects the autonomic nervous system — the part of the body that runs the automatic jobs we don’t have to think about, like breathing, heartbeat, blood pressure, and digestion. When this system isn’t working as it should, these functions can get out of balance. Dysautonomia is an umbrella term for several related conditions, and it can show up differently for each person. Some common symptoms include a racing heart, dizziness, fainting, changes in blood pressure, stomach or digestion problems, and extreme tiredness. Because the autonomic nervous system affects so many areas of the body, symptoms can change or come and go over time. While there’s no single cure, there are many ways to manage symptoms.

Type 1 Diabetes  

The body naturally produces insulin — a hormone (and protein) that helps turn food into energy the body can use. In people with Type 1 Diabetes (T1D), the body stops making insulin, which causes sugar from food to build up in the blood instead of reaching the cells. To stay healthy, people with T1D take insulin through injections or a small device called an insulin pump. They also check their blood sugar levels several times a day, either by using a glucose meter or a continuous glucose monitor (CGM). When blood sugar is too high or too low, it can cause symptoms like shakiness, confusion, dizziness, mood changes, or extreme thirst. If not treated properly, blood sugar levels outside the normal range can lead to serious complications — which is why daily care is so important. 

Oral Allergy Syndrome

Oral Allergy Syndrome (OAS) is a condition where the immune system reacts to certain proteins in fresh fruits, vegetables, or nuts because they are similar to pollen from trees, grasses, or weeds. This means reactions can be seasonal — for example, people with pollen allergies may notice OAS symptoms in spring or fall when pollen levels are high. Common symptoms include itching or tingling in the lips, mouth, or throat, and sometimes mild swelling. In some cases, reactions can be more serious and lead to anaphylaxis, a life-threatening allergic reaction, so it’s important to know which foods can cause problems and follow guidance from a healthcare professional.