Final answer:
Liam is likely experiencing allergic rhinitis, commonly known as hay fever. He should seek medical treatment from a healthcare professional such as a primary care doctor or an allergist. Treatment options may include antihistamines, nasal sprays, or allergy shots.
Step-by-step explanation:
Based on the symptoms described, Liam is likely experiencing allergic rhinitis, also known as hay fever. The redness, itchiness in his eye, and the additional symptoms of a stuffy nose and occasional coughing suggest an allergic reaction. Allergic rhinitis is typically triggered by the pollen of certain plants.
Liam should start by seeking medical treatment from a healthcare professional such as a primary care doctor or an allergist. The doctor can perform a physical examination and take a detailed medical history to confirm the diagnosis of allergic rhinitis. They may also order additional tests, such as an allergy skin test or blood tests, to determine specific allergens causing the reaction.
Once the diagnosis is confirmed, the doctor may recommend various treatment options, including over-the-counter antihistamines, nasal sprays, or allergy shots (immunotherapy) to alleviate symptoms and manage the allergy.