The child is 2 years and 4 months old. Since this summer, when the child was not even two years old, they have started to wake up with hiccups, rubbing their eyes and nose, accompanied by urticaria. They often have itchy legs and buttocks, and scratching will result in urticarial bumps. The other day, they went to the hospital for an allergy source detailed check-up, and multiple allergens were found, with dust mite allergy being the worst at level 5. I would like to ask if a 2-year-old and 4-month-old child can use Xitai desensitization treatment? What other detailed checks are needed? Will the child definitely not be allergic to dust mites anymore as they grow up?