There is a possibility of infection when a wound is exposed to a small amount of water, and the chance of infection is usually small. Ordinary unboiled water contains microorganisms such as bacteria, fungi, and viruses, which may lead to the invasion of bacteria, fungi, and viruses after the wound is stained with water, resulting in wound infection; however, due to the existence of the human body’s immune system, when a small amount of bacterial, fungal, or viral infection occurs, the human body will kill the microorganisms with the immune cells, and then excrete them out of the body to avoid the infection. The patient should disinfect the wound in time and avoid water; if the wound is accidentally stained with water, a sterile cotton swab should be used to wipe away the water and then use iodine povidone to disinfect the wound, which can effectively prevent the wound from becoming infected. If the wound has adverse symptoms, you should seek medical treatment in time.