Obsessive-Compulsive Disorder (OCD) is characterized by a pattern of unwanted thoughts and fears (obsessions) that lead to repetitive behaviors (compulsions). Here are the key clinical features:

1. Obsessions
-Intrusive Thoughts: Persistent, unwanted thoughts, images, or urges that are distressing and difficult to control.
-Common Themes: Fear of contamination, fear of losing control, aggressive or taboo thoughts, and a need for symmetry or perfection.

2. Compulsions
-Repetitive Behaviors: Actions performed to reduce the anxiety associated with obsessions or to prevent a feared event.
-Common Examples: Excessive handwashing, checking things repeatedly (e.g., locks, appliances), arranging items in a specific order, and counting.

3. Impact on Daily Life
-Time-Consuming: Individuals spend more than an hour a day on obsessions and compulsions, which interferes with daily activities.
-Distress: These behaviors cause significant anxiety, distress, or impairment in social, occupational, or other areas of functioning.

4. Associated Features
-Avoidance: People with OCD may avoid situations that trigger their obsessions or compulsions.
-Co-occurring Conditions: OCD often occurs with other mental health disorders, such as anxiety disorders, depression, and tic disorders.

5. Onset and Course
-Age of Onset: Symptoms typically begin in childhood, adolescence, or early adulthood.
-Chronic Nature: OCD is a long-lasting disorder that can wax and wane over time, often worsening during periods of stress.

Understanding these clinical features can help in recognizing and addressing OCD, leading to better management and improved quality of life for those affected.