Here are some common causes of mental ama:

• Negative emotions such as 
  anger, greed, resentment, 
  and guilt.

• Psychological stresses such as 
  money worries, family 
  problems, and unwholesome 
  surroundings.

• Contact with other people's 
  negative thinking.

• Exposure to violence or 
  shocking experiences in life 
  or in the media.