If only the free edge of the nail plate is delaminated and the rest of the nail plate is normal in colour and texture, then moisturisation is required and can be done by soaking in warm water and applying a moisturiser. You can also massage the nail plate with a smaller, more penetrating natural substance, such as olive oil or jojoba oil, and then apply a mineral oil to act as a sealant, such as petroleum jelly. If there is any other abnormality apart from the delamination of the nail plate, it should be seen in hospital and treated under medical supervision.