How Scars Are Formed
When you get a cut or have some sort of surgery, it will take some time for the wound to heal and scar to form. After a wound closes, excessive water loss occurs for up to two years so that the skin has time to reform itself.
As your skin attempts to heal itself, it starts to dehydrate which tells the cells in your skin to produce collagen. The more water loss that occurs, the more excess collagen is produced.
When too much collagen is formed, it causes raised scarring. The collagen is trying to thicken that part of the skin to reduce water loss. If left untreated, the thickened section will form a keloid scar.