I blackout in the office, my colleague said I did not hit my head anywhere. Though one of the college said that the temple in my left side was red. Since then, I have a swelling in the head near my temple and inside the hair. The pain sometimes is severe. I went ro hospital they said the blood work is normal and the ct scan is normal. I still feel the swell in my head and the throbbing pain. sometime is too severe to endure and it will subside by itself and every time I shower there will be increase in pain. It been 3 weeks already.