Why does it hurt when salt is sprinkled on a wound?
Feb 09, 2023
Source: Cainiu Health
Dr. Li Feng
Introduction
Sprinkling salt on a wound causes pain because salt has a high density. When applied to a wound, it creates significant osmotic pressure, leading to severe dehydration and necrosis of cells near the wound, thereby stimulating nerves and causing pain. In daily life, it is important to consume more fresh fruits, vegetables, and other foods rich in vitamins and amino acids. Avoid spicy and irritating foods such as chili peppers, onions, and garlic.
It hurts to put salt on a wound because salt has a high density. When applied to a wound, it creates a highly osmotic environment, causing severe dehydration and necrosis of nearby cells, which stimulates nerves and results in pain.
After an injury, skin tissue normally regenerates on its own, so the number of cells gradually increases. Table salt is primarily composed of sodium and chloride ions in the form of sodium chloride. Salt is highly corrosive and does not evaporate easily. If directly applied to a wound, it creates an environment with higher solute concentration than the cells. Upon contact, salt releases a large number of ions, forming a hypertonic environment around the wound that rapidly dehydrates cells, strongly irritating them and causing intense pain. This condition can significantly delay wound healing. Additionally, salt may contain impurities; applying it to a wound could lead to infection or even pus formation. The wound should be promptly dressed and cleaned daily with normal saline. It's also important to protect the wound from sweat penetration, which could trigger severe pain.
In daily life, one should eat more fresh fruits and vegetables rich in vitamins and amino acids. Avoid spicy and irritating foods such as chili peppers, onions, and garlic.
