My son, has a very bad head ache, can't see well out of left eye, then, his left arm was numb, then spread to side of face, and tongue, and even felt like throat. He is 15, very tall, and thin (healthy thin). He said it has happended before. Migranes run in our family but usually at age 30 or so. Not sure if its dehyration, migrane, or something serious.