It is an individual decision and can be prevented. However, the problems in a family which might lead one member to commit suicide may adversely affect other members of the family as well and put them at a greater risk of attempting suicide. Usually the person's feelings are related to a temporary emotional upset, the loss of a loved one or a painful or terminal illness. Usually people are suicidal for a short time. If they can get help and support to get through the crisis that they are experiencing, they can return to a normal life.
Suicide is a very democratic disease.
It affects all ages, races, socioeconomic levels. Because most people who talk about or attempt suicide do not really want to die, but rather are crying for help, there is a lot someone can do to help a suicidal person.