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Though I’ve never lost a friend or family member to suicide, I have lost a patient.

I have known a number of people left behind by the suicide of people close to them, however. Given how much losing my patient affected me, I’ve only been able to guess at the devastation these people have experienced. Pain mixed with guilt, anger, and regret makes for a bitter drink, the taste of which I’ve seen take many months or even years to wash out of some mouths.

The one question everyone has asked without exception, that they ache to have answered more than any other, is simply, why?

Why did their friend, child, parent, spouse, or sibling take their own life? Even when a note explaining the reasons is found, lingering questions usually remain: yes, they felt enough despair to want to die, but why did they feel that? A person’s suicide often takes the people it leaves behind by surprise (only accentuating survivor’s guilt for failing to see it coming).

People who’ve survived suicide attempts have reported wanting not so much to die as to stop living, a strange dichotomy but a valid one nevertheless. If some in-between state existed, some other alternative to death, I suspect many suicidal people would take it. For the sake of all those reading this who might have been left behind by someone’s suicide, I wanted to describe how I was trained to think about the reasons people kill themselves. They’re not as intuitive as most think.

In general, people try to kill themselves for six reasons:

1. They’re depressed. This is without question the most common reason people commit suicide. Severe depression is always accompanied by a pervasive sense of suffering as well as the belief that escape from it is hopeless. The pain of existence often becomes too much for severely depressed people to bear. The state of depression warps their thinking, allowing ideas like “Everyone would all be better off without me” to make rational sense. They shouldn’t be blamed for falling prey to such distorted thoughts any more than a heart patient should be blamed for experiencing chest pain: it’s simply the nature of their disease.

Because depression, as we all know, is almost always treatable, we should all seek to recognize its presence in our close friends and loved ones. Often people suffer with it silently, planning suicide without anyone ever knowing. Despite making both parties uncomfortable, inquiring directly about suicidal thoughts in my experience almost always yields a honest response. If you suspect someone might be depressed, don’t allow your tendency to deny the possibility of suicidal ideation prevent you from asking about it.

2. They’re psychotic. Malevolent inner voices often command self-destruction for unintelligible reasons. Psychosis is much harder to mask than depression — and arguably even more tragic. The worldwide incidence of schizophrenia is 1% and often strikes otherwise healthy, high-performing individuals, whose lives, though manageable with medication, never fulfill their original promise.

Schizophrenics are just as likely to talk freely about the voices commanding them to kill themselves as not, and also, in my experience, give honest answers about thoughts of suicide when asked directly. Psychosis, too, is treatable and usually must be for a schizophrenic to be able to function at all. Untreated or poorly treated psychosis almost always requires hospital admission to a locked ward until the voices lose their commanding power.

3. They’re impulsive. Often related to drugs and alcohol, some people become maudlin and impulsively attempt to end their own lives. Once sobered and calmed, these people usually feel emphatically ashamed. The remorse is usually genuine, and whether or not they’ll ever attempt suicide again is unpredictable. They may try it again the very next time they become drunk or high, or never again in their lifetime. Hospital admission is, therefore, not usually indicated. Substance abuse and the underlying reasons for it are generally a greater concern in these people and should be addressed as aggressively as possible.

4. They’re crying out for help and don’t know how else to get it. These people don’t usually want to die but do want to alert those around them that something is seriously wrong. They often don’t believe they will die, frequently choosing methods they don’t think can kill them in order to strike out at someone who’s hurt them—but are sometimes tragically misinformed. The prototypical example of this is a young teenage girl suffering genuine angst because of a relationship, either with a friend, boyfriend, or parent who swallows a bottle of Tylenol—not realizing that in high enough doses Tylenol causes irreversible liver damage.

I’ve watched more than one teenager die a horrible death in an ICU days after such an ingestion when remorse has already cured them of their desire to die and their true goal of alerting those close to them of their distress has been achieved.

5. They have a philosophical desire to die. The decision to commit suicide for some is based on a reasoned decision often motivated by the presence of a painful terminal illness from which little to no hope of reprieve exists. These people aren’t depressed, psychotic, maudlin, or crying out for help. They’re trying to take control of their destiny and alleviate their own suffering, which usually can only be done in death. They often look at their choice to commit suicide as a way to shorten a dying that will happen regardless. In my personal view, if such people are evaluated by a qualified professional who can reliably exclude the other possibilities for why suicide is desired, these people should be allowed to die at their own hands.

6. They’ve made a mistake. This is a recent, tragic phenomenon in which typically young people flirt with oxygen deprivation for the high it brings and simply go too far. The only defense against this, it seems to me, is education.

The wounds suicide leaves in the lives of those left behind by it are often deep and long lasting. The apparent senselessness of suicide often fuels the most significant pain survivors feel. Thinking we all deal better with tragedy when we understand its underpinnings, I’ve offered the preceding paragraphs in hopes that anyone reading this who’s been left behind by a suicide might be able to more easily find a way to move on, to relinquish their guilt and anger, and find closure. Despite the abrupt way you may have been left, those don’t have to be the only two emotions you’re doomed to feel about the one who left you.

Alex Lickerman is an internal medicine physician at the University of Chicago who blogs at Happiness in this World. He is the author of The Undefeated Mind: On the Science of Constructing an Indestructible Self.

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