Borderline Personality Disorder (BPD) is a psychiatric condition with prominent features such as emotional dysregulation, relationship difficulties, self-harm tendencies, disturbances in self-image, and problems with control. It usually emerges in early adulthood and may continue throughout life. People with BPD may show the following characteristics:

Emotional dysregulation: Frequent and intense emotional fluctuations. They may shift rapidly from happiness to anger, or from joy to sadness.
Relationship difficulties: Individuals with BPD may face intense and complex relationship problems. They may form very intense bonds while also experiencing excessive fears, fear of rejection, and abandonment anxiety.
Self-harm tendencies: Self-harming behaviours such as cutting, burning, or substance misuse may be seen frequently. These behaviours are usually aimed at relieving or expressing emotional pain.
Impulsivity: People with BPD tend to act without thinking. They may be prone to alcohol or substance misuse, overspending, reckless driving, or impulsive decisions in sexual relationships.
Identity disturbance: Individuals may have an unclear sense of self, experience confusion about their identity, and undergo rapid identity shifts.
Feelings of emptiness: They may frequently experience an inner sense of emptiness and seek various things to fill it.
Paranoid thoughts: People with BPD may often suspect that others are hostile toward them.

Individuals with BPD usually require a long-term and intensive treatment process. This may include therapy, medication, and support groups. With treatment, it is possible to improve quality of life and help the person find a healthier balance in relationships. However, the treatment process varies from person to person, and the difficulties experienced are often complex. Specialist assessment is required.