Allergy have very good medication in Homoeopathy.
But Allergies are in your genetics, it can not be altered but it's intensity can be decreased.
First of all find out what allergens exactly affect you.
Get your blood test done
I.e CBC & Serum allergy test.
Find out the cause of your allergy.
Next Steps
Serum allergy test helps you in finding out the main causative agent of your allergy.