Respiratory and allergic conditions refer to a broad spectrum of disorders affecting the lungs, airways & immune system, often triggered by environmental factors, infections or genetic predisposition. Common respiratory conditions include asthma, chronic obstructive pulmonary disease, which can cause symptoms such as shortness of breath, coughing, wheezing & chest tightness. Allergic conditions, like allergic rhinitis, sinusitis & anaphylaxis, occur when the immune system overreacts to allergens such as pollen, dust, mold or certain foods, leading to inflammation, nasal congestion, sneezing & skin rashes.