What causes red scar lumps on the chest?

There may be several causes for the development of red keloids on the chest: 1. Severe trauma, skin tension, inflammatory infections, immune factors, and genetic predisposition may lead to uncontrolled collagen synthesis during the healing process, resulting in excessive growth and keloid formation. 2. Some individuals have a predisposition to scarring (keloid-prone constitution), making them more likely to develop keloids even after minor skin injuries. 3. Local factors such as foreign bodies in chest wounds, inflammation, or mechanical pulling at the site may also stimulate excessive skin repair, leading to keloid formation.