A hypertrophic scar is a type of raised scar that develops after skin injury or surgery. It occurs when the body produces too much collagen during the healing process, leading to a thickened area of skin. These scars are usually red or purple and can feel itchy or uncomfortable. Unlike keloid scars, hypertrophic scars remain within the boundaries of the original wound. Hypertrophic scars can appear anywhere on the body but are most common on the chest, back, and shoulders. They may improve over time but can take months or even years to flatten and fade. Treatments include silicone gel sheets, corticosteroid injections, and laser therapy to help reduce their appearance.