A number of psychological states increase the risk of suicide including: hopelessness, loss of pleasure in life , depression and anxiousness.  A poor ability to solve problems, the loss of abilities one used to have, and poor impulse control also play a role.   In older adults the perception of being a burden to others is important.  Suicide in which the reason is that the person feels that they are not part of society is known as egoistic suicide .  Rates of suicide appear to decrease around Christmas.  One study however found the risk may be greater for males on their birthday.