The condition of a small toe with two flaps is known clinically as a splintered toe, also known as a compound nail or flap nail. There are different types of flap nails, including clear, fused, and degenerate types by trait, and unilateral and bilateral types by location. Flap nail is an inherited physiological phenomenon and is inherited in an autosomal dominant manner. The flap nail may not always appear directly at birth, but may change with age and appear slowly; some flap nails are already visible during embryonic life and gradually become clear after birth, and the flap nail is usually visible around the age of 5. Usually no treatment is needed, but the overlapping of the toenails leads to thickening of the toenails, which can easily be compressed and worn down during long-term walking, leading to discomfort and even localized pain in the feet. And because the gap in the middle of the toenail is easy to form a natural breeding ground for fungi and bacteria, such as inadvertent abrasion of the little toe, may directly cause the occurrence of infection, prone to nail fungus, gray nails, etc.. Daily advice is to keep your feet dry, dry the toe seam after bathing, do not over cut the toenail, keep its normal length and avoid involving the nail bed. If local breakage and redness occurs, it is recommended to seek medical treatment to control the inflammation in a timely manner. In addition, if the flap nail often affects your normal life and causes pain every time you walk, it is recommended that you go to a hospital dermatologist to have the flap nail removed and leave a single nail piece.