Morgellons is a controversial and poorly understood condition in which individuals report sensations of crawling, stinging, or biting on or under the skin, often accompanied by the belief that fibers or other materials are emerging from skin lesions. People affected may experience itching, skin sores, fatigue, difficulty concentrating, and emotional distress. Medical research has not identified an infectious or parasitic cause, and many experts classify Morgellons as a form of delusional infestation or a condition associated with underlying psychiatric or neurological factors. The symptoms are real and can be distressing, but the exact nature and cause of the condition remain subjects of debate. Comprehensive medical and psychological evaluation is typically recommended to address both physical and emotional symptoms.