how to tell if you're allergic to your shampoo?
['Red skin.', 'Scaly patches.', 'Blisters that ooze.', 'Burning or itching, which may be intense.', 'Swelling of the eyes, face, and genital area.', 'Hives.', 'Sun sensitivity.', 'Darkened, "leathery,"and cracked skin.']