A finger prick can be treated in different ways depending on the depth of the puncture, including removing the puncture, disinfecting it and bandaging it. If the puncture is shallow, you can remove the puncture by yourself and disinfect it with iodine povidone, use bandages or sterile gauze to bandage it, and pay more attention to disinfection. If the puncture is deeper, and there is active bleeding, accompanied by swelling and pain, you can first local pressure to stop bleeding, timely medical care, under anesthesia to expand the trauma to remove the foreign body, and thoroughly disinfected to stop bleeding, and then sterile gauze bandage, if necessary, need to be injected with tetanus antitoxin, to prevent tetanus infection. Serious cases are recommended to actively seek medical treatment.