Table 4: The frequency of people with migraine and positive skin test based on the type of allergen.

Type of allergen	Frequency
Tree	9 (22.5%)
Grass	18 (45%)
Weed	16 (40%)
Beetle	6 (15%)
Mite	4 (10%)
Alternaria	0
Aspergillus	0
Tomato	1 (2.5%)
Egg	1 (2.5%)
Shrimp	2 (5%)
Beef	0
Chocolate	1 (2.5%)
Cow milk	2 (5%)
Pepper	3 (7.5%)
Almonds	1 (2.5%)
Walnuts	0