List 5 medical or psychological conditions that biofeedback has been used to treat.

1. Chronic pain: Biofeedback has been used to help individuals manage and reduce chronic pain, including headaches, migraines, and fibromyalgia.

2. Anxiety disorders: Biofeedback techniques have been utilized to help individuals learn to control their physiological responses to anxiety, such as heart rate and muscle tension.

3. Hypertension: Biofeedback has been shown to be effective in helping individuals lower their blood pressure through relaxation and stress-reduction techniques.

4. Attention-deficit/hyperactivity disorder (ADHD): Biofeedback has been used as a non-pharmacological treatment for ADHD, helping individuals improve their focus and attention.

5. Insomnia: Biofeedback has been used to help individuals improve their sleep patterns and reduce insomnia by teaching relaxation and stress-reduction techniques.