Deflated nails may be caused by lack of nutrition, gray nails, trauma, etc., and should be analyzed according to the symptoms. 1. Lack of nutrition: deflated nails may be caused by lack of calcium or protein. If there is a prolonged lack of calcium or protein, it may lead to nail malnutrition, resulting in shriveled nails, which may also cause nails to fall off easily. 2. Gray nails: this condition is caused by fungal infection, the surface of the nail appears uneven symptoms, and sometimes can also lead to deflated nails. It is usually necessary to go to the hospital in time, under the guidance of the doctor for antifungal treatment. 3. Trauma: If the nail is accidentally traumatized, the nail may be broken from the root, which will easily cause the nail to be deflated. There may be other reasons for deflated nails, so it is recommended to go to the hospital in time and follow the doctor’s instructions for standardized treatment.