Lichenification of the extremities

Introduction The moss of the limbs becomes localized thickening and roughening of the skin, and the surface texture is deepened and widened, and the affected part is divided into a plurality of diamond-shaped or polygonal-shaped compartments. Mossy changes are often a manifestation of certain chronic pruritic skin diseases. Neurodermatitis is a typical lichen-like change.

Cause

Causes of neurodermatitis:

1. Mental factors: It is currently considered to be the main cause of this disease. Emotional fluctuations, excessive mental stress, anxiety, and sudden changes in living environment can all aggravate and repeat the disease.

2. Gastrointestinal dysfunction, abnormal function of the endocrine system, sensitization of chronic lesions in the body, may also become a causative factor.

3. Local irritation: such as the friction caused by the hard collar, chemical stimulation, insect bites, sun exposure, scratching, etc., can induce the occurrence of this disease.

Neurodermatitis is a skin dysfunction with significant skin damage. It occurs mostly in the back of the neck or on both sides, the elbow fossa, the national arm, the forearm, the thigh, the calf and the lumbosacral region. Chang Cheng tablets appear, triangular or polygonal flat-top papules, thickened skin, ridged ridges, deep furrows, shaped like moss. Often reddish or light brown. Intense itching is its main symptom. If the skin of the whole body has obvious damage, it is also called diffuse neurodermatitis.

an examination

Related inspection

skin color

Neurodermatitis is a typical lichen-like change. Its dermatitis occurs in the neck, limbs, and genitals. It is easy to be rubbed by the skin. It starts with itchy skin and has small papules. Later, it is thick and thick, and the skin is deepened. It is brownish red or black. Brown, see bloody after scratching. The occurrence of this disease is related to excessive mental stress, work fatigue, poor sleep, and irregular life. It belongs to the snoring of Chinese medicine, also called psoriasis, which is different from the psoriasis mentioned by Western medicine. The cowhide called by Western medicine is called psoriasis, and Chinese medicine is called white epilepsy. Its skin lesions are characterized by: layers of silvery white scales on the basis of skin erythema, which are clam-shell-shaped, scraping off the scales and showing bleeding spots, generally less itchy, mostly on the head and extremities (outside). There is obvious seasonality. Eczema is also chronic and often mossy. Eczema is a common allergic inflammatory skin disease. The rash is pleomorphic. When it is chronic, the skin is thick and rough, and the sulcus is obvious.

Differential diagnosis

Differential diagnosis of limb mossy changes:

Lichen planus: The name of traditional Chinese medicine is purpura, which is not uncommon in clinical practice, and the incidence rate has increased in recent years. Because of the ever-changing performance of their skin lesions, they are often misdiagnosed. Lichen planogens occur in young people and adults. The lesions are mainly manifested on the skin and mucous membranes, and a few cases can invade the fingers, toenails and hair. Its most typical damage is a flat papule that is slightly higher than the leather surface. The size of the millet grain to the mung bean is a clear polygonal or circular shape. The color is mostly purple or purple, and it can also be dark red, reddish brown and dirty gray. The papules of the same patient tend to be the same size, densely distributed, some scattered, and some merge into plaques of different sizes and shapes. Most patients have varying degrees of itching.

Flat red moss: Lichen planus is also known as lichen ruber planus. It is an inflammatory skin disease that can affect skin mucosa and hair. The cause of the disease is unknown. In recent years, there have been many studies on its pathogenesis. It is suggested that a variety of theories of lichen planus have certain characteristics in the clinic. Typical skin lesions are purple red or dark red cap needles to lentils-sized polygonal papules or patches. , can be self-resolving, more with obvious itching, there are certain areas of predilection, and it is a good change in the histopathology of middle-aged people. Other skin lesions with different manifestations have histopathological changes of lichen planus and are attributed to atypical lichen planus. This disease is similar to the "purple wind" recorded in the medical literature of the motherland. For example, the "Zhejiang Zhengzheng" purple hurricane records: "French purple wind, from the skin purple spots, the skin of the skin."

Eczema: Eczema is a common inflammatory skin disease caused by a variety of internal and external factors in the epidermis and dermis. It is generally considered to be related to allergies. Its clinical manifestations are characterized by symmetry, exudation, pruritus, pleomorphism and recurrence. It is also an allergic inflammatory skin disease characterized by rash diversity, symmetric distribution, repeated itching, and easy to evolve into chronic. Can occur in any part of any age, any season, but often in the winter recurrence or exacerbation of exudation tendency, chronic course, easy to recurrent.

Dermatitis: Dermatitis and eczema are often used synonymously to refer to a type of skin inflammation that represents the skin's allergic response to chemicals, proteins, bacteria, and fungi. The term eczema has no special meaning, while dermatitis has a limiting meaning. If dermatitis is used instead of eczema as a diagnostic term, it refers to a combination of dermis and epidermis, which can be acute, subacute, and chronic. These three can exist together.

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