How do different countries manage and treat Needle Grass pollen allergies?

Managing and treating Needle Grass pollen allergies is similar across various countries. The first step is always the identification and avoidance of allergens, in this case, Needle Grass pollen. Since it's difficult to avoid pollen entirely, especially during peak seasons, individuals are recommended to stay indoors or use pollen filters and air purifiers.

For symptomatic relief, over-the-counter antihistamines are globally available and widely used. These include drugs like cetirizine, loratadine, and fexofenadine. Nasal sprays containing steroids are also commonly prescribed owing to their anti-inflammatory properties. Options like fluticasone and mometasone are popular.

For severe cases which are unresponsive to those treatments, immunotherapy, also known as desensitization or hypo-sensitization, is often considered. In this long-term treatment, small doses of allergen are introduced to the body, either through injections or sublingual tablets to build up immunity against it. This method is prevalent in Europe, the US, and other developed nations with advanced medical technologies.

In some parts of Asia, certain complementary and alternative therapies using herbs and acupuncture are practiced. However, these methods should always be pursued under professional guidance.

It's pivotal to remember that while these treatments are widely adopted, variation can occur due to a person's specific response to treatment, environmental factors, and healthcare accessibility within different countries. Hence, consultation with an allergy specialist is imperative to devise a personalized treatment plan.