The nail pits are called nail dents. In children, they are usually caused by a lack of trace elements and various vitamins and should be examined by a doctor. Of course, for most normal people, it may also be caused by diseases, which can be judged by other accompanying symptoms and examination, and if there is fungal infection, it needs to be actively treated to avoid infection and generalization. It is mostly seen clinically in the following cases: 1. Psoriatic nail: as psoriasis invades the nail bed or nail matrix causing nail surface lesions, patients can be seen clinically with sunken nail spots, thickened nail beds and peeling nails, which usually involve multiple nails, and changes in the nail plate often parallel the severity of psoriatic lesions. Exfoliation with fluorouracil solution and peeling of the affected nails can be treated under medical supervision. Some patients with local infection can apply antibiotics such as cefixime to prevent infection; 2. Exfoliative dermatitis: mostly caused by drug allergy, secondary skin diseases such as psoriasis and eczema, and secondary tumors of the lymphatic reticular system, etc. The onset of the disease is more acute. Patients can see the whole body skin redness and flaking, the nails are mostly invaded, and small pits, longitudinal ridges and transverse grooves of the nail plate appear. The symptoms are improved by removing the cause of the disease, maintaining the body’s water and electrolyte balance, and medication, including dexamethasone, loratadine, cefixime, methotrexate, and isotretinoin. It is mostly treated clinically with topical glacial acetic acid, tincture of iodine, amorolfine nail coating, etc. Salicylic acid cream, urea cream, etc. can also be used externally.