Lisa Denton
I have felt very weak for a week now and for three days have experienced flashing in the left side of my head, however I don't have an headache. The flashing is constant and appears more apparent when I close my eyes or try to sleep. I am also feeling very weak at all times. What do you think it could possibly be, anything serious? I would be very grateful if you could reply asap. Yours Faithfully Lisa.