There are several types of scars that can be maintained, depending on the type and severity of the injury, the patient's age, the general health and each one’s healing abilities. Hypertrophic scars are red and raised, filled with excessive amounts of collagen, which can cause itching. Although they are considered as harmless and do not develop beyond the limits of the original wound, they are often annoying and, in some cases, painful. Keloids are oversized areas of scar tissue that appear irregular, raised, pink or red and may continue to grow over time. While they can appear anywhere on the body, they are most common on the face, neck, ears, chest or shoulders. Contractures are more severe scars that restrict movement in the area where the tissue is pulling during the healing process. This type of scar usually occurs after large tissue losses or in wounds that occur in the joints.