Heinänuhana
Heinänuhana, commonly known as hay fever or allergic rhinitis, is a non-infectious inflammatory condition of the nasal passages. It is triggered by an allergic reaction to airborne substances, most frequently pollen from grasses, trees, and weeds, but also dust mites, mold spores, and animal dander. When an allergen is inhaled, the body's immune system mistakenly identifies it as a harmful invader and releases histamine and other chemicals. These chemicals cause the characteristic symptoms of hay fever.
The primary symptoms include sneezing, runny nose (rhinorrhea), nasal congestion, and itchy eyes, nose, throat, and
Diagnosis of hay fever is typically made based on a patient's medical history and symptom presentation. Allergy