Onycholysis is a medical condition that involves the separation of the nail from its bed. Some common synonyms for the term onycholysis include nail separation, nail detachment, and nail lifting. Other related terms include nail plate fissure and ungual separation. The condition can be caused by a variety of factors, including fungal infections, trauma to the nail, psoriasis, and certain medications. The treatment for onycholysis depends on its underlying cause and may include topical or oral medication, surgery, or simply waiting for the nail to grow back. Early diagnosis and treatment are key to preventing further damage to the nail and promoting healthy regrowth.