Brain injury and emotions
A brain injury can change the way people feel or express emotions. A person with TBI can have several types of emotional problems.

Difficulty controlling emotions or “mood swings”
Some people may experience emotions very quickly and intensely but with very little lasting effect. For example, they may get angry easily but get over it quickly. Or they may seem to be “on an emotional roller coaster” in which they are happy one moment, sad the next and then angry. This is called emotional lability.

If you know of a family member or friend with head trauma treat them with care and seek medical help for them.  Be patient.  Do not let them abuse alcohol or Drugs.