<unk> s are areas of fibrous tissue that replace normal skin (or other tissue) after injury. A<unk>  results from the biologic process of wound repair in the skin and other tissues of the body. Thus,<unk> ring is a natural part of the healing process. With the exception of very minor lesions, every wound (e.g. after accident, disease, or surgery) results in some degree of<unk> ring.<unk>  tissue is not identical to the tissue which it replaces and is usually of inferior functional quality. For example,<unk> s in the skin are less resistant to ultraviolet radiation, and sweat glands and hair follicles do not grow back within<unk>  tissue. A myocardial infarction, commonly known as a heart attack,  causes<unk>  formation in the heart muscle which leads to loss of muscular power and possibly heart failure. However, there are some tissues (e.g. bone) which can heal without any structural or functional deterioration, and in fact bone tissue may be structurally stronger after a break.
The word<unk>  was derived from the Greek word eschara, meaning place of fire (fireplace).
Scar
Edema
Injection fibrosis
Erythema
Mottling
Acne
Nail changes
Dermatitis