First migraine is a vascular headache
and treatment is there for acute attack and preventive therapy if it is too frequent? Allergy to house dust may cause nose problem like Rhinitis and may be bronchial asthma
but he can avoid exposure to dust and can take antihistaminics eg. Cetrizine ,But a Low WBC count can be serious a normal count is 4000-11000 . it can not be 0000 as very low count a granulocytosis
predisposes to infections and needs expert medical attention and further investigation and consultation with Hematologist
and Infection expert .