Allergies: sneezing, itchy eyes, clear runny nose, itchy throat, tracking pollen or pets. Asthma: wheezing, chest tightness, breathlessness, and a cough worse at night or with exercise.
They share an immune root, often coexist (allergic asthma is common), and one exposure can trigger both. The self-check that reframes things: "allergies" that include wheeze, chest tightness, breathlessness, night-waking cough, or coughing with exercise or hard laughter are asthma until proven otherwise, and spirometry settles it. Untreated asthma airways remodel over time, and rescue inhalers work, so the evaluation pays. The emergencies differ: allergies escalate to anaphylaxis (throat swelling, full-body hives, breathing trouble, dizziness: epinephrine and 911), asthma to a severe attack (cannot speak full sentences, rescue inhaler failing, ribs pulling in: 911). At the first visit, bring the pattern: which symptoms, what triggers, when at night, and expect spirometry and possibly allergy testing.
What to do
Common questions
Is it asthma or allergies?
The split is where the action is. Allergies live in the nose and eyes: sneezing fits, itchy watery eyes, clear runny nose, itchy throat, and symptoms that track exposure (pollen seasons, cats, dust). Asthma lives lower, in the airways: wheezing (a whistling sound on exhale), chest tightness, shortness of breath, and a cough that is famously worse at night and with exercise. The overlap that complicates everything: they share a root cause (an over-reactive immune system), about half or more of people with asthma have allergic asthma, and an allergen exposure can trigger both the sneeze and the wheeze in the same person. Per MedlinePlus, asthma's signature symptoms are that wheeze, the chest tightness, breathlessness, and coughing, especially at night or early morning. The self-check that matters: if your "allergies" come with any wheezing, chest tightness, breathlessness, or a cough that wakes you at night or shows up every time you exercise or laugh hard, that is not just allergies; that pattern is asthma until evaluated, and it is very diagnosable with a breathing test (spirometry). Why it matters: untreated asthma airways remodel over time, and rescue inhalers exist and work, so the evaluation pays. The emergencies are different for each: anaphylaxis for allergies (throat swelling, hives everywhere, trouble breathing, dizziness, epinephrine and 911), and a severe asthma attack (cannot speak full sentences, inhaler not relieving, ribs pulling in) also 911. The first appointment is simple: describe which of the two patterns you have, when it started, and what triggers it, and expect spirometry and possibly allergy testing.