The writer William Styron once called depression a “gray rain of horror.” This mood disorder can appear suddenly without an obvious reason, or as a result of a setback or personal loss. It causes a persistent feeling of sadness, helplessness, hopelessness, guilt, or inadequacy. Depression also interferes with concentration, lowers motivation, and affects all aspects of daily life.
According to the World Health Organization and the Ministry of Health of Ukraine, depression is among the five most common mental disorders and is a leading cause of disability worldwide. In Ukraine, experts estimate that more than 2 million people suffer from depression, which is about 6–7% of the adult population. The prevalence of the disorder is growing, especially among young people and the working-age population.
Depression can take various forms—from Major Depressive Disorder to dysthymia or Seasonal Affective Disorder. Depressive episodes are also a core component of bipolar disorder. This condition affects many body systems, including the immune system. It disrupts sleep and appetite, sometimes leading to weight loss and in other cases to weight gain. Depression is often accompanied by anxiety, and research suggests they share common vulnerability mechanisms.
There is still no full understanding of the nature of depression. More and more data indicate that it may be a kind of defensive reaction of the body—a “shutdown” in response to danger or defeat, aimed at conserving energy. Some studies link the tendency toward depression to diet: both directly (lack of omega-3 fatty acids) and indirectly (the state of gut microbiota). But depression is not just about the body; it is also about thoughts and emotions. It causes pain both to the sufferers and their loved ones, and it is increasingly diagnosed in children.
Even in severe cases, depression is treatable. It is often cyclical, and early intervention can prevent repeat episodes. Cognitive Behavioral Therapy (CBT) is considered the most effective approach, working with negative thinking patterns, either with or without the use of antidepressants. There is also evidence that regular mindfulness meditation, either alone or combined with psychotherapy, helps prevent the development of depression by reducing sensitivity to stressful events and weakening obsessive negative thoughts.
What are the signs of depression?
Not all people with depression experience the same symptoms. Some have few, while others have many, and these can change over time. Depression often manifests as persistent sadness, anxiety, or an inner emptiness, alongside a sense of hopelessness, pessimism, guilt, or worthlessness. It can lead to a loss of interest in activities that once brought pleasure, including a decreased interest in sex. Typical signs include decreased energy, fatigue, irritability, restlessness, and difficulty concentrating or making decisions. Many people develop thoughts of death or suicide.
Physical manifestations include sleep disturbances (insomnia, oversleeping, or early morning awakening) and changes in appetite. Chronic physical symptoms often arise as well, such as headaches, digestive problems, or persistent unexplained pain.
What causes depression?
There is no single cause. Most often, depression arises from a combination of genetic, biological, psychological, and social factors. It can be a result of traumatic events, the loss of loved ones, relationship problems, or severe stress. Subsequent episodes may appear even without an obvious trigger.
Not every difficult event leads to depression. Research indicates that it happens when stress triggers excessive negative rumination about oneself, which pulls the mood down. Brain research shows that in people with depression, certain areas of the brain responsible for regulating mood, sleep, and behavior function differently. Some of these changes may be the cause of the disorder, while others may be the result of it. In some cases, depression is hereditary, indicating a genetic vulnerability.
How is depression treated?
Even severe depression responds well to treatment. The earlier it begins, the better the result and the lower the risk of relapse. The first step is an examination by a doctor to rule out other possible causes of similar symptoms, such as thyroid problems or the lingering effects of infections. The doctor also determines if the patient has suicidal thoughts or uses alcohol or drugs.
The main treatment methods are psychotherapy and medication. Cognitive Behavioral Therapy shows high effectiveness, either alone or with antidepressants. Psychotherapy helps change the thinking patterns that maintain depression, while medication reduces the severity of symptoms so that the person can actively participate in therapy.
Natural approaches
Depression requires active treatment because each episode increases the likelihood of future ones. However, in mild or moderate forms, non-pharmacological methods can sometimes be effective. A healthy diet, regular physical activity, mindfulness practice, and forming new habits of thinking and behavior are all beneficial.
Depression and physical health
Depression affects not only emotions but also the body. It triples the risk of heart disease, weakens the immune system, increases vulnerability to infections, and may be linked to certain types of cancer. People with depression are also more likely to develop diabetes and osteoporosis. A condition where a chronically low mood and low energy levels persist for many years is called dysthymia.
Living with depression
Everyone experiences temporary low moods sometimes, but clinical depression is a long-lasting, repeating cycle of negative thoughts, helplessness, and low energy. It is not a sign of weakness and is not a state that can be overcome by willpower alone. A person with depression cannot simply “pull themselves together” and become healthy.
Modern life adds risk factors: high demands from childhood, a lack of face-to-face communication, increasing dependence on gadgets, and a culture of material values instead of social connections. Despite this, some researchers believe that depression may have a certain purpose: it forces a person to reflect on their own life and the problems that need solving.
Main forms of depression
Most often, depression refers to Major Depressive Disorder—a persistent state of sadness, apathy, and helplessness. In bipolar disorder, depressive periods alternate with episodes of mania, where the person has excessive energy and impulsivity. Postpartum depression occurs in some women after the birth of a child and requires treatment because it interferes with caring for the baby. Seasonal Affective Disorder usually appears in winter when there is a lack of sunlight; special light therapy often helps.
Biology of depression
Depression deeply affects biological processes. It changes the functioning of the nervous system, disrupts the production of neurotransmitters, weakens the formation of new brain cells, affects energy metabolism in neurons, and disrupts circadian rhythms. All of this determines the nature and severity of the symptoms.
Depression and suicide
Most cases of suicide are linked to mental disorders, most often depression. The more severe the course, the higher the risk. At the same time, the majority of people with Major Depressive Disorder do not attempt suicide. About 5% of patients have suicidal thoughts. The most serious warning signal is talking about a desire to die or feeling like a burden to others.
Depression in children
Depression is increasingly affecting children and teenagers, and sometimes even preschoolers. In children, it may manifest the same way as in adults—sadness, fatigue, loss of interest—but it often appears as irritability, aggression, and problematic behavior. Possible causes include bullying, excessive social media use, and the disappearance of “free play,” which has traditionally been a vital area for development and joy in childhood.