Experiencing intrusive thoughts and engaging in repetitive behaviors like nail biting, pimple/scab picking, and body hair plucking could be signs of obsessive-compulsive disorder (OCD). However, it's essential to remember that only a qualified mental health professional can diagnose a mental health condition accurately.
OCD is a complex disorder characterized by intrusive, distressing thoughts (obsessions) and repetitive behaviors or mental acts (compulsions) that a person feels driven to perform to reduce anxiety or prevent perceived harm. The behaviors you described, such as nail biting and picking, could be considered compulsive if they are done excessively and interfere with your daily life.
If you are concerned about your symptoms, I encourage you to seek help from a mental health professional. They can conduct a comprehensive evaluation and provide an accurate diagnosis. Treatment for OCD often involves cognitive-behavioral therapy (CBT) and/or medication, and it can be highly effective in managing the symptoms and improving quality of life.
Remember, seeking professional help is an important step towards understanding your experiences and getting the appropriate support and treatment for your specific situation.