How does eczema come about?

As people's living conditions improve, the surrounding environment has also undergone corresponding changes. Environmental pollution has begun to increase year by year, increasing the incidence of eczema. Based on the cause of eczema, we can divide eczema into two types: chronic eczema and acute eczema. Both types of eczema are related to the surrounding environmental influences, so what specifically causes eczema?

How does eczema come about?

The causes of eczema are complex and are often the result of the interaction of internal and external factors. Internal factors such as chronic digestive system diseases, mental stress, insomnia, excessive fatigue, mood changes, endocrine disorders, infections, metabolic disorders, etc., and external factors such as living environment, climate change, food, etc. can all affect the occurrence of eczema. External stimuli such as sunlight, cold, dryness, heat, hot water washing, various animal furs, plants, cosmetics, soaps, artificial fibers, etc. can all induce it. It is a delayed allergic reaction caused by complex internal and external factors.

Eczema is a skin inflammatory reaction with severe itching caused by a variety of internal and external factors. It is divided into three stages: acute, subacute and chronic. The acute phase has an exudative tendency, while the chronic phase has infiltration and hypertrophy. Some patients directly present with chronic eczema. The skin lesions are characterized by polymorphism, symmetry, itching and easy recurrence.

1. According to the manifestation of skin lesions, it is divided into three stages: acute, subacute and chronic.

(1) Acute eczema

The skin lesions initially appear as numerous dense millet-sized papules, papulovesicles or small blisters with a flushed base, which gradually merge into patches. Due to scratching, the tops of the papules, papulovesicles or blisters appear as obvious punctate exudates and small erosive surfaces with unclear edges after being scratched. If secondary infection occurs, the inflammation will be more obvious and may form pustules, pus scabs, folliculitis, furuncles, etc. Conscious severe itching. It often occurs on the head, face, behind the ears, distal limbs, scrotum, and perianal area, and is often distributed symmetrically.

(2) Subacute eczema

After the inflammation of acute eczema is alleviated, the skin lesions are mainly small papules, scabs and scales, with only a small amount of papulovesicles and erosions. Still have severe itching.

(3) Chronic eczema

Acute or subacute eczema often turns into chronic eczema due to repeated attacks. It may also start as chronic eczema. The symptoms include thickening and infiltration of the skin in the affected area, brown-red or pigmentation, rough surface, scaling, or scabs due to scratching. Conscious itching. It is commonly found in the calves, hands, feet, elbows, popliteal fossa, vulva, and anus. The course of the disease is uncertain, prone to relapse, and difficult to heal.

2. Depending on the extent of skin lesions, it is divided into two categories: localized eczema and generalized eczema.

(1) Localized eczema

It only occurs in specific parts, so it can be named according to the part, such as hand eczema, vulva eczema, scrotal eczema, ear eczema, breast eczema, perianal eczema, calf eczema, etc.

(2) Generalized eczema

There are many skin lesions, which are widespread or scattered in multiple parts of the body. Such as nummular eczema, autosensitive eczema, and xerotic eczema.