Education and safety note. This page is for general information. It cannot diagnose you, assess your individual risk, or replace care from a qualified professional. If you are in immediate danger, may harm yourself or someone else, cannot stay safe, or have symptoms that may be medically urgent, contact local emergency services or crisis support. In Ireland, call 112 or 999 or go to the nearest emergency department; you can also read the HSE crisis guidance. Medication decisions need to be discussed with a qualified prescriber.
If there is a family history of depression, it is understandable that you would wonder if the condition is in your genes. The answer is simple: while genes can make you more vulnerable, they do not determine the future.
There are all sorts of things involved when it comes to depression. Sure, there is the genetic component, but so too are your physical and mental health, hormones, sleep, stress, trauma, the quality of your relationships, your social circumstances, substance use and whether or not you have support. It is a matter of many factors interacting with one another.
It is worth putting this in perspective because the question can be frightening. You might be inclined to think, "My parent was depressed, so I will be as well," or "If it is in my DNA, there is no point trying to change anything." That is not the case at all. A family history is something to be aware of, but it does not determine the future. Some people with no such background end up with severe depression; others who do have it in their family never do.
Research has been telling us for some time that major depression is to an extent heritable. Twin and family studies are one thing, but large genome-wide association studies have given us more nuance. They show that depression is polygenic, meaning risk is built up from a host of genetic variants, each adding a little bit. Wray and his team did a major study in Nature Genetics that pinpointed several risk loci and put some finer detail on the genetic architecture of the illness. Yet the field is also clear on one point: there is no single "depression gene" to blame.
Genes may influence temperament, stress sensitivity, sleep, inflammation, reward, threat processing, neurodevelopment, personality traits or risk for other conditions. They may also influence the environments people experience, choose or struggle to leave. But environment matters. Childhood adversity, bullying, loneliness, chronic illness, bereavement, poverty, discrimination, unsafe relationships, work stress, trauma and lack of support can all affect depression risk. Protective factors matter too: safe relationships, treatment, routines, meaningful activity, therapy, medication when appropriate, physical healthcare, community and time.
The phrase "endogenous depression" still appears in people's searches. It is an old way of putting it, referring to a type of depression that is believed to have its roots in the body's own biology rather than some external happening. These days you are more likely to hear talk of major depressive disorder or bipolar depression, and for that matter melancholic, psychotic, perinatal, seasonal, trauma or adjustment-related forms. The term has fallen by the wayside in public mental health discourse, though you may still run across it in older pieces of writing; it is best to use it carefully.
There is a risk in calling something endogenous: it lends an air of mystery to the condition, as if it were fixed or apart from a person's life. True, some episodes seem to come on with no discernible cause. But then there are those set off by stress or loss which, through a host of biological means – be it poor sleep, appetite, rumination, inflammation or hormones – take on a life of their own. In the end, drawing a hard line between what is inside and what is outside is an oversimplification. Your biology is shaped by life and in turn shapes how you live it.
If depression feels genetic or biological, a medical conversation can be useful. A GP or psychiatrist can assess severity, risk, personal and family history, sleep, mania/hypomania symptoms, psychosis, medications, substances, physical health and treatment options. It is particularly important to mention any family history of bipolar disorder, psychosis, severe depression, suicide, hospital admission, or strong reactions to antidepressants. That information can affect treatment decisions.
Medication may help some people with depression, especially when symptoms are moderate to severe, recurrent, biologically intense, or not improving with psychological and practical support alone. But medication decisions need to be discussed with a qualified prescriber who can consider diagnosis, other relevant conditions, physical health, other medicines, substance use, pregnancy or breastfeeding situation, risks and preferences. Do not start, stop, reduce, increase, combine, switch or restart medication because of something you read online.
There is room for psychotherapy and counselling even in cases of depression that are rooted in biology or family history. A person should not think therapy is only for those with an obvious tale to tell; it can help in dealing with self-criticism, isolation, shame and grief, as well as the way we relate to others or the tendency to avoid things. It helps with trauma and stress, with finding meaning, and on a practical level with learning to live differently when your mood is down. For a better grasp of the various therapy traditions, you might find Jonathan Haverkampf's take on CBT versus psychodynamic psychotherapy instructive. His writing, which puts communication at the fore, is particularly apt where the depression has left one feeling disconnected and at a loss for meaningful words.
What can a person do with family history? First, treat it as information, not identity. Second, notice early warning signs: sleep change, withdrawal, irritability, loss of pleasure, rumination, hopelessness, alcohol/substance increase, appetite change, or thoughts of death. Third, build support before crisis: GP, therapist, trusted people, routines, movement, daylight, medication review where relevant, and a plan for what to do if symptoms worsen. Fourth, reduce shame. Depression in a family is not a moral failure passed down through generations. It is a signal to take care seriously.
It can help to separate risk from prediction. A genetic make-up can point to a vulnerability but it is not a crystal ball as to when or how badly you will be depressed, nor does it tell you what the remedy will be. Then you have all the other things that come into play with that type of vulnerability: sleep and stress, the state of your relationships, grief, work pressures, loneliness, trauma, alcohol or other substances, physical ailments, even pregnancy and postpartum issues. That is precisely why good care has to consider the whole person and not just attribute it to one cause.
If depression includes suicidal thoughts, self-harm risk, thoughts of harming someone else, psychosis, severe agitation, inability to eat or drink, or feeling unable to stay safe, seek urgent help now. In Ireland, HSE guidance advises 112 or 999 or an emergency department if there is immediate danger; Samaritans can be contacted on 116 123.
Depression can be influenced by genes, but genes are not the whole person. The more helpful question is not only "Where did this come from?" but also "What support, treatment and changes might reduce its hold on my life?"
Related Pages
- Depression therapy in Dublin and online
- Trauma therapy in Dublin and online
- Counselling for couples
- Relationship and communication difficulties
- Cognitive behavioural therapy (CBT)
- Anxiety resources in Ireland
- Mental health help pathways
Sources and review. Published or updated in May 2026. This page is educational and uses public-health, guideline, peer-reviewed, or professional sources where clinical claims are made.