Seasonal Allergic Rhinitis
Seasonal allergic rhinitis, commonly called hay fever, is an immune reaction to airborne allergens such as tree, grass, and weed pollen. Symptoms appear or worsen at specific times of year and typically include persistent sneezing, a watery or blocked nose, itchy eyes, and a scratchy throat. In tropical and subtropical parts of Asia, including Thailand, Malaysia, Singapore, and the Philippines, year-round humidity and varied flowering seasons mean symptoms can recur across most months rather than fitting the neat spring-summer pattern seen in temperate climates.
Medicine used to treat Seasonal Allergic Rhinitis
Controlling symptoms day to day
Non-sedating antihistamines are the first choice for most people. Fexofenadine works by blocking histamine receptors without causing significant drowsiness, making it suitable for daily use at school or work. For a broader look at medicines in this area, see the allergy relief category. Alongside medication, reducing exposure helps: keep windows closed during high-pollen periods, shower after time outdoors, and wear wrap-around sunglasses to limit eye contact with allergens. If symptoms include significant eye irritation, antihistamine eye drops can be used alongside an oral tablet. See a doctor if symptoms are severe enough to disrupt sleep, if you develop facial pain or pressure suggesting sinusitis, or if asthma symptoms worsen alongside nasal symptoms.