What are the main symptoms of a depressive episode?
Nov 17, 2025
Source: Cainiu Health
Dr. Zhang Baohua
Introduction
The main symptoms of a depressive episode generally include markedly low mood, severe loss of energy, impaired cognitive function, disturbances in sleep and appetite, and loss of interest or pleasure. During an episode, individuals persistently feel sadness and hopelessness, show diminished positive responses to surroundings, and are prone to intense negative emotions triggered by minor events, such as unexplained crying, irritability, and anger.
Major depressive episodes are typically characterized by symptoms such as low mood, severe loss of energy, cognitive impairment, disturbances in sleep and appetite, and loss of interest or pleasure. A detailed analysis is as follows:
1. Low mood: During an episode, individuals persistently feel sad or hopeless, showing little positive response to surroundings. Minor events may trigger intense negative emotions, such as unexplained crying, irritability, or anger. Thoughts like "life is meaningless" may arise, and the emotional state cannot be improved by external positive factors.
2. Severe loss of energy: Individuals feel extremely fatigued throughout the day. Simple daily activities such as dressing or washing require significant effort. Even after adequate rest, energy levels fail to recover. In severe cases, individuals may remain bedridden and unable to carry out basic tasks such as work, studying, or household chores.
3. Cognitive impairment: Difficulty concentrating makes it hard to focus on conversations, reading, or thinking. Memory noticeably declines, with frequent forgetfulness regarding important matters. Thinking becomes sluggish, speech may be hesitant, and expression disorganized or illogical, making it difficult to respond effectively to everyday problems.
4. Sleep and appetite disturbances: Sleep patterns are significantly disrupted—either suffering from insomnia and frequent awakenings throughout the night, or experiencing excessive sleepiness and difficulty waking up. Appetite may be completely lost, leading to rapid weight loss, or individuals may engage in binge eating to cope with emotions, resulting in significant short-term weight fluctuations, often accompanied by digestive issues.
5. Loss of interest or pleasure: There is a complete loss of interest in previously enjoyed activities such as exercise or socializing. Even when participating, no sense of enjoyment is felt. Individuals become indifferent to life's pleasures and remain in a prolonged state of anhedonia, perceiving everything as unattractive or meaningless.
If multiple symptoms listed above are observed in oneself or others for more than two weeks, timely professional help from a psychologist or psychiatrist should be sought. Depressive episodes require scientific intervention for effective relief; delaying treatment may lead to worsening symptoms. Meanwhile, family and friends should offer understanding and support.
