I am John,19 years old student. I had a fall from a bike four months ago. I had hurt my head and was unconscious, I was admitted in a hospital and was diagnosed as a case of Severe Head Injury, D.A.I. A CT scan was taken and there was no internal injuries .The report said No obvious abnormality detected. I was on medication for the past three months. I was fine till last night, when I got up from the floor to reach out for my book on the table that I had a severe pain in the lower part of my head just above my neck. I blacked out after a few minutes my friends woke me up. I realized I had fallen on the floor. I later recalled that I had slight throbbing pain in the same place a couple of hours earlier in the evening.