hi,i've been experiencing sharp pain which lasts for only a few seconds on different parts of my head at different time.i sometimes feel pain or numbness(i don't know exactly)in my hands and feet sometimes. i used eye drops and tablets for about two years 'cause i had alcer in my cornia.i am even using a vitamin tablet prescribed by my eye doctor.i am also using medicine(antibyotic and acne lotion) by prscribed skin doctor.i am 21 years old.pls give me a reply and help me out.