为什么真皮层会受伤

真皮是人体皮肤的重要组成部分，它位于表皮下方，起着保护和支撑的作用。然而，有时候真皮层会受到伤害，引发各种问题。让我们一起来探索一下真皮层受伤的原因。

首先，外部创伤是真皮层受伤最常见的原因之一。这包括割伤、擦伤、磨擦和撞击等。这些创伤可以导致真皮层的损伤和炎症反应，进而影响其功能和结构。外部创伤可能是意外造成的，也可能是由于工作或运动中的事故而产生。

External injuries are one of the most common causes of damage to the dermis layer. These include cuts, abrasions, friction, and impact. These injuries can lead to damage and inflammatory response in the dermis layer, affecting its function and structure. External injuries can be accidental or may occur due to accidents during work or sports.

其次，长期暴露在紫外线下也会对真皮层造成损伤。太阳的紫外线中的紫外B（UVB）和紫外A（UVA）辐射可以穿透表皮，直接影响真皮层。这会导致真皮层中的胶原蛋白受损，使皮肤失去弹性和保湿能力。长期暴露在紫外线下，可能增加皮肤癌和其他皮肤问题的风险。

Furthermore, long-term exposure to ultraviolet (UV) radiation can also damage the dermis layer. The UVB and UVA radiation in sunlight can penetrate the epidermis and directly affect the dermis layer. This can lead to damage to the collagen proteins in the dermis, causing skin to lose its elasticity and moisture-retention ability. Prolonged exposure to UV radiation may increase the risk of skin cancer and other skin issues.

另外，内部因素也可以导致真皮层受伤。例如，某些疾病或疾病治疗可能影响真皮层的健康。例如，自身免疫性疾病如系统性红斑狼疮（SLE）和硬皮病等会导致真皮层发生炎症反应和损伤。某些药物，如皮质类固醇，可能会削弱真皮层，使其更容易受到损伤。

Internal factors can also contribute to the dermis layer's injury. For example, certain diseases or treatments for diseases can impact the health of the dermis. Autoimmune diseases such as systemic lupus erythematosus (SLE) and scleroderma can cause inflammatory responses and damage to the dermis layer. Certain medications, such as corticosteroids, can weaken the dermis, making it more susceptible to injury.

除了上述因素，生活方式和皮肤护理也可能影响真皮层的健康。不良的生活方式，如吸烟、饮食不健康和缺乏锻炼，可能导致真皮层受损。此外，不正确的护肤方法或使用刺激性化妆品和洗涤剂也可能对真皮层产生负面影响。

In addition to the factors mentioned above, lifestyle and skincare practices can also impact the health of the dermis layer. Unhealthy lifestyle habits such as smoking, unhealthy diet, and lack of exercise can contribute to dermis damage. Additionally, improper skincare methods or the use of harsh cosmetics and cleansers can also have a negative impact on the dermis layer.

综上所述，真皮层受伤的原因多种多样。外部创伤、长期暴露在紫外线下、内部因素以及不良的生活方式和护肤方法都可能导致真皮层的损伤。了解这些原因有助于我们保护和维护人体皮肤的健康。

In conclusion, there are various reasons for the injury to the dermis layer. External injuries, prolonged exposure to UV radiation, internal factors, as well as unhealthy lifestyle habits and skincare practices can all contribute to damage to the dermis layer. Understanding these reasons helps us protect and maintain the health of our skin.

英文翻译对照：

Why Does the Dermis Layer Get Injured?

The dermis is an important component of the human skin, located beneath the epidermis, playing a role in protection and support. However, sometimes the dermis layer gets injured, causing various issues. Let's explore the reasons behind dermis layer injuries.

Firstly, external trauma is one of the most common causes of dermis layer damage. This includes cuts, abrasions, friction, and impacts. These traumas can lead to damage and inflammatory response in the dermis layer, affecting its function and structure. External injuries can occur accidentally or due to accidents during work or sports.

Secondly, long-term exposure to ultraviolet (UV) radiation can also damage the dermis layer. The UVB and UVA radiation in sunlight can penetrate the epidermis and directly affect the dermis layer. This can lead to damage to the collagen proteins in the dermis, causing the skin to lose its elasticity and moisture-retention ability. Prolonged exposure to UV radiation may increase the risk of skin cancer and other skin issues.

Furthermore, internal factors can also contribute to dermis layer injuries. For example, certain diseases or treatments for diseases can impact the health of the dermis layer. Autoimmune diseases such as systemic lupus erythematosus (SLE) and scleroderma can cause inflammatory responses and damage to the dermis layer. Certain medications, such as corticosteroids, can weaken the dermis, making it more susceptible to injury.

Aside from the mentioned factors, lifestyle and skincare practices can also impact the health of the dermis layer. Unhealthy lifestyle habits such as smoking, an unhealthy diet, and lack of exercise can contribute to dermis damage. Additionally, improper skincare methods or the use of harsh cosmetics and cleansers can also have a negative impact on the dermis layer.

In conclusion, there are various reasons for dermis layer injuries. External trauma, prolonged exposure to UV radiation, internal factors, as well as unhealthy lifestyle habits and skincare practices can all contribute to damage to the dermis layer. Understanding these reasons helps us protect and maintain the health of our skin.