Why does a wound heal faster when salt is sprinkled on it?
May 27, 2023
Source: Cainiu Health
Dr. Li Feng
Introduction
Under normal circumstances, applying salt directly to a fresh wound may help kill bacteria and reduce inflammation, but it does not accelerate wound healing. Moreover, putting salt on a wound can intensify pain, as the salt creates a highly concentrated solution at the injury site. Due to osmosis, water from within the body's cells (lower concentration) moves toward the higher concentration of salt, drawing out cellular fluid and potentially causing severe dehydration and tissue necrosis at the wound site.
Generally speaking, applying salt directly to a wound immediately after injury may have some antibacterial and anti-inflammatory effects, but it does not accelerate wound healing.
Firstly, putting salt on a wound intensifies pain. The salt creates a highly concentrated solution at the wound site, causing water from body tissues (which are lower in concentration) to move toward the higher concentration through osmosis. This draws moisture out of cells, leading to severe dehydration and tissue necrosis, resulting in intense pain. Additionally, applying salt can lead to infection. Salt exposed to air may carry bacteria, and when applied to an open wound, these bacteria can introduce infection. Moreover, since the skin's protective barrier is lost in a wound, pain receptors are exposed and come into direct contact with the salt, further stimulating pain signals.
Therefore, proper wound care involves promptly cleaning the wound with a cotton swab, rinsing it with normal saline, and disinfecting the area with iodine solution to promote healing. If the wound is severe, it is advisable to seek professional medical treatment at a reputable hospital.
