The overgrowth of fibrous tissue usually produced at the site of a scar is known as a keloid. Keloids are characterized by the formation of excessive scar tissue that extends beyond the boundaries of the original wound or injury. They are often raised, firm, and reddish in appearance, and can cause discomfort, itching, and a feeling of tightness in the affected area. Keloids can occur in response to a variety of injuries, including cuts, burns, surgery, and even acne vulgaris. Although they are not typically cancerous, keloids can be unsightly and may cause functional impairment in certain cases. Treatment for keloids may involve a combination of topical medications, steroid injections, laser therapy, and surgical excision.