Detailed answer

Smoking has been shown to impair the healing process and increase the risk of developing keloid scars. Nicotine and other chemicals in cigarettes constrict blood vessels, reducing the supply of oxygen and nutrients to the skin, which is necessary for proper wound healing. This can result in delayed healing and poorer scar formation. Additionally, smoking can weaken collagen production, leading to thinner and more fragile scar tissue. It is important for individuals who smoke to quit in order to optimize scar healing and minimize potential complications.