Barb on the hands of children can be caused by zinc deficiency or other causes such as dryness, which requires a comprehensive analysis. The barbs on the fingers of children may be caused by vitamin or trace element deficiencies, with zinc deficiency being the most common. In addition to acanthosis, other symptoms such as anorexia, paranoia, picky eating, and growth retardation may also be present. Vitamin deficiency can also lead to acanthosis, so parents need to balance the baby’s diet and eat more vegetables and fruits containing vitamins, such as radish and cantaloupe. Bad habits can also lead to finger barbs, such as putting fingers in the mouth or rubbing them against rough objects. Some babies may also suffer from fungal infections such as grey nails or ringworm, which require symptomatic treatment in the hospital. You should soak your hands in warm water to soften the skin around the nail and then cut it off with a nail clipper to avoid pain or infection. In addition, you should strengthen your child’s hand care and apply moisturizer appropriately to avoid dry and cracked cuticles and barbs.