Itchy scars

Introduction The keloid is more uncomfortable. It is essentially a connective tissue tumor on the skin. It is a scar characterized by persistent strong hyperplasia. It is often expressed as a crab-like infiltration of the surrounding skin. The lesion is raised out of the skin, uneven, irregular in shape, hard and tough. Scars are caused by various factors such as trauma, and the fibroblasts and capillary networks proliferate to form new granulation tissue, which causes the fiber cells to gradually stop dividing, and there is an imbalance of collagen fibers and degradation, and nerve endings grow. The epithelial tissue at the edge of the wound grows toward the center, covering the granulation tissue and forming a scar.

Cause

Scars are caused by various factors such as trauma, and the fibroblasts and capillary networks proliferate to form new granulation tissue, which causes the fiber cells to gradually stop dividing, and there is an imbalance of collagen fibers and degradation, and nerve endings grow. The epithelial tissue at the edge of the wound grows toward the center, covering the granulation tissue and forming a scar.

The formation of scars is mainly affected by the following factors:

1. Age, young people are prone to occur, especially the highest rate of hypertrophic scars in 10-20 years old, mainly due to puberty development, strong tissue growth, strong post-traumatic responsiveness, and increased skin tension;

2. Nutritional status;

3, physical fitness;

4, skin tension;

5, infection;

6, skin pigmentation, colored human pigment cells are more, also susceptible to stimulated reactions;

7, clinical medication, r interferon and other drugs will affect the healing of wounds;

8, the treatment of the external environment - dust, talcum powder, fiber and hair follicles, sebaceous glands, sweat gland residues can cause tissue reactions, leading to scar hyperplasia.

an examination

Related inspection

Skin test blood routine saline skin test

In clinical patients who see scars and itching, we must first see whether there is a history of trauma, history of infection, history of surgery, history of allergies, diagnosis based on clinical symptoms and signs; second, physical examination, according to the symptoms of scar hyperplasia Identification of depressed scars, superficial scars, scar atrophy and sag; if necessary, laboratory tests to determine the cause and severity of scar hyperplasia, to provide a basis for further treatment.

Differential diagnosis

(1) superficial scar: more common after bruising and shallow burns, characterized by a slightly rough appearance, pigmentation changes, local flat and soft, no dysfunction, generally do not need to be treated.

(2) hypertrophic scar: also known as hypertrophic scar, more common in deep second and shallow third degree burns and thick medium thick skin donor site wound healing. It is thick (up to 1-2 cm) and hard, red or dark purple, painful and itchy, often affecting work and rest. About 6 months later, the scar became softer and slightly flatter, the congestion decreased, the capillaries decreased, and the symptoms of itching gradually diminished or disappeared.

(3) atrophic scar: also known as unstable scar, common in the head skull electric shock, after extensive burns and chronic ulcer healing. The scar is hard, the local blood vessels are less, it is reddish or white, the deep tissue is tightly adhered, and it cannot withstand friction and weight. After rupture, it often lasts for a long time, and the late stage can cause malignant changes.

(4) contracture scar: more common in deep burn wounds without skin grafting and let them self-healing, often severely disrupting functions, such as valgus valgus, lip valgus, chest adhesions, flexion contracture deformity of each joint. Long-term scar contracture can affect the development of muscles, tendons, and nerves, causing joint stiffness, dislocation, and deformity.

(5) keloid: also known as the crab foot swelling, a mass formed by connective tissue. More common in burns, injuries or minor injuries that do not cause the patient's attention. The edge of the scar is significantly higher than the skin, and exceeds the original lesion range, pink or purple, very hard, inelastic, poor blood supply. Keloids are particularly good in the upper part of the body. The head, neck, and sternum are in the middle, shoulders, and upper arms, and the eyelids, areola, and penis are rare.

(6) Scars: The scars are wrinkled and shaped like duck plague. Such scars are most common in burns, occasionally in the cutting tears of the skin and improper placement of surgical incisions. Large blemishes often occur in the anterior neck, axillary fossa, elbow fossa and perineum. Small ones are common in internal and external spasm, nasolabial folds, mouth, nostrils, palmar side, finger sputum, tiger's mouth, urethral opening, vaginal opening and other parts.

In addition, there are still types of depressed scars, bridge scars and linear scars.

The material in this site is intended to be of general informational use and is not intended to constitute medical advice, probable diagnosis, or recommended treatments.