One of the major criticisms of the dark triad theory is its potential to stigmatize people living with Cluster B personality disorders.

Scream therapy is controversial among psychologists -- but for women, it's a tool to express pent up rage.

Unlike a regular migraine, which can last between four and 72 hours, a silent migraine usually lasts for about 15 to 30 minutes.

Besides protecting them against penile and anal cancers, the HPV vaccine can also prevent men from spreading the HPV virus to others.