1. Mood swings:
A person with bipolar disorder may experience extreme mood swings, from manic highs to depressive lows. These mood swings can be sudden and severe and can last for days or weeks at a time.
2. Social withdrawal:
A person with depression may start to withdraw from friends and activities that they used to enjoy. They may isolate themselves more and more until they are barely socializing at all.
3. Changes in sleeping habits:
A person with insomnia may have difficulty falling asleep or may wake up frequently during the night. They may also sleep for longer periods of time than they did previously. A person with hypersomnia may sleep for unusually long periods of time, and may have difficulty waking up in the morning.
4. Unusual eating habits:
A person with anorexia nervosa may severely restrict their intake of food, to the point where they are dangerously underweight. A person with bulimia nervosa may binge on large amounts of food, and then purge by vomiting or using laxatives.
5. Increased alcohol or drug use:
A person with substance abuse problems may start to use alcohol or drugs more frequently, or in larger quantities than before. They may also start to neglect their responsibilities, such as work or school, in order to use substances.
6. Neglecting personal hygiene or appearance:
A person with schizophrenia may neglect their personal hygiene and appearance, due to delusions or hallucinations that they are experiencing. They may also become increasingly disorganized and chaotic in their behavior.
7. Persistent feelings of sadness or emptiness:
A person with depression may feel persistently sad, empty, or hopeless. They may lose interest in activities that they used to enjoy and may have difficulty concentrating or sleeping.
8. Inability to experience pleasure:
A person with anhedonia may be unable to experience pleasure from activities that they used to enjoy. This can include sex, hobbies, and social interactions.
9. Excessive anger, hostility, or irritability:
A person with a borderline personality disorder may have extreme mood swings and may become easily angry or agitated. They may also engage in self-destructive behaviors, such as cutting themselves or taking drugs.
10. Difficulty concentrating or thinking clearly:
A person with attention deficit hyperactivity disorder (ADHD) may have difficulty concentrating or focusing on tasks. They may also be easily distractible and impulsive in their behavior.