Allergies are often seen as something that only causes sneezing or watery eyes. But for some people, the symptoms do not stop there. A cough can linger for weeks or even longer. When that happens, it can feel confusing and tiring. It can also disturb sleep and daily routine. Understanding how allergies affect the airways helps make sense of why a cough may stay for so long. Why allergies can lead to chronic cough Allergies trigger the immune system. When the body reacts to dust, pollen, or other irritants, the airways can become sensitive. This irritation can lead to mucus buildup or a tickle in the throat. Over time, the body keeps trying to clear the throat, which results in a repeated cough. For some people, this reaction does not go away quickly. Even when the main allergy trigger is not obvious, the airways may still stay inflamed. That is why a cough linked to allergies can last longer than expected. How the body reacts When the immune system is exposed to allergens, it r...