Nail bed getting shorter and shorter may be caused by fungal infection, nail bed damage, nail malnutrition and other reasons. 1. Fungal infections: such as gray nails and other diseases, due to fungal infections that cause the nail bed to be invaded, there may be lesions on the nail bed, resulting in symptoms such as the nail bed becoming shorter and shorter, pain and so on. 2. Damage to nail beds: Nail beds can be damaged by friction caused by trimming nails too short or bad habits such as biting nails, which may affect the development of nail plates and lead to the symptoms of shortening nail beds. 3. Nail malnutrition: it may be that the patient’s nutritional intake is insufficient, which makes the nail bed grow abnormally, causing the nail to become thicker, thinner, shorter and shorter and so on. The shortening of the nail bed can also be seen in other diseases, it is recommended that patients go to the hospital in a timely manner, in accordance with the doctor’s instructions for treatment, to avoid delaying the condition.