Phantom limb syndrome is a condition where individuals who have lost a limb still feel sensations, including pain, in the area where the limb once was. This phenomenon occurs because the brain continues to receive signals from nerves that were once connected to the missing limb, leading to the perception of its presence. People with phantom limb syndrome may experience various sensations, such as itching, tingling, or even severe pain, known as phantom pain. Treatment options include medications, physical therapy, and techniques like mirror therapy, which can help alleviate these sensations and improve the quality of life for those affected.