I often hear patients ask, “When is a good time to shower?” In fact, this question is the relationship between wounds and water. I often hear: wounds should not be touched by water; wound excipients should be dry and changed in the hospital when dirty; wounds should not be bathed until they grow well! In fact, the question is all about the relationship between wounds and water. So, when the wound dressing change, is not to the wound with water? In fact, water itself does not have a certain relationship to wound healing; on the contrary, certain wounds need to heal faster in a relatively moist environment. These specific clinical issues are not described in detail today. When we change the dressing, we actually use a solution containing antiseptic ingredients, which may be an aqueous solution or an alcoholic solution containing bacteria-killing drugs such as iodophor, Anil Iodine, Chlorhexidine, etc. It plays an important role in wound cleaning and maintaining a sterile environment, therefore, whether the wound touches water or not is actually not directly related to wound healing, in general. Why do we emphasize the need to keep wound excipients dry? The excipients we cover the wound are not completely airtight, when the excipients are contaminated with water, bacteria can easily infect the wound through the wet excipients. Infection.