Because unmanaged symptoms severely impact quality of life (sleep, work, activities). it also  cause sustained airway inflammation leading to permanent lung damage, increased infection risk and can result in life-threatening asthma attacks and  hospitalizations while proper control allows for a full, active life.

It is like a "sneak peek" to see what makes you itchy or sneezy. A doctor puts tiny drops of common allergens (like pollen, dust, or peanuts) on your skin lightly pricks the skin under each drop with a tiny needle. If you're allergic, you'll get small, red, itchy bumps (like mosquito bites) in about 15-20 minutes, showing exactly what your body reacts to.  

Immunotherapy is a preventive treatment for allergic reactions to substances such as grass pollens, house dust mites and fungus. Immunotherapy can actually change the course of the disease, often providing relief for years after you stop the treatment. In children, it can even help prevent the development of new allergies or the progression of allergic rhinitis into asthma