Assalam O Alaikum,
It is our experience that draining good quantity of Hijamah blood reduces allergic reactions.
For nasal allergies, Hijamah on the head & neck is the most beneficial, and for skin allergy, Hijamah on the back is recommended + on the legs (required for few patients)
A good Tibb-e-Nabawi diet is compulsory, avoid junk foods, fried foods, spicy food, excess salt, pickles, vegetable oils, refined carbohydrates, reduce the intake of animal proteins. If you also suffer with wheezing cough & breathing problems, avoid cold natured foods & dairy products as well.
Sa'oot of Qust-al-Bahri will be so good for you Insha'Allah, also take Kalonji & Za'fraan