Purulent dactylitis is a subcutaneous suppurative infection of the palm surface of the distal phalanx, which is mostly caused by puncture wounds. The palm side of the distal phalanx is called the finger pulp. There are fibrous septa under the skin of the distal finger creases, which form a closed gap under the skin of the finger pulp. The finger pulp is divided into many small intervals by fibrous cords, and the small intervals are filled with fat globules. The skin here is thick, tough, and lacks elasticity. It has a lot of nerve receptors. Once an infection occurs, the tension of the finger pulp increases significantly and the pain is significant. The subcutaneous tissue is directly connected to the distal phalanx. Therefore, purulent dactylitis can easily develop into purulent osteomyelitis of the distal phalanx. Purulent dactylitis is often caused by minor injuries or puncture wounds, and the pathogenic bacteria are mostly Staphylococcus aureus.