Homeopathy can help treat allergies by diminishing the hypersensitive immune system of allergic individuals to a healthy functioning system. Allergens trigger immune cells like T cells and B cells to produce antibodies that activate mast cells to release histamine, causing sneezing, runny nose, and other allergy symptoms. Homeopathy works to relieve acute allergy symptoms effectively without side effects by reducing the immune system's overreaction to allergens over time.