Mystery scars on Obama's head prompt another question from conspiracy theorists - has the President had brain surgery?

(UK Daily Mail) - He has been plagued with questions and doubts concerning his background throughout his first term as President.

Questions like - is Barack Obama actually American? Is he a Muslim? Is he actually an alien from another planet? - have frequently been asked.

The next question circulating on the internet - has President Obama had brain surgery?

President Obama meeting comedian George Lopez as the First Lady looks on. Some observers believe this image shows a distinctive scar which looks like those left after brain surgery. However, there could simply be another explanation such as a bad haircut or birth mark (UK Daily Mail)