为什么眼睛红肿？

眼睛红肿是许多人常常遇到的问题。无论是因过度疲劳、过敏反应还是其他原因，这个常见的症状给我们带来了不少不便。那么，到底为什么眼睛会红肿呢？下面我们将探讨几个可能的原因。

一、过度用眼。长时间盯着手机、电视或电脑屏幕，不仅容易导致眼部疲劳，还会导致眼睛发红和肿胀。这是因为用眼过度会造成眼睛表面细胞损伤，并引发眼睛充血。

Too much eye strain. Staring at a phone, TV, or computer screen for long periods of time can not only cause eye fatigue, but also redness and swelling. This is because excessive eye strain can damage the surface cells of the eyes and cause them to become red.

二、过敏反应。有些人对空气中的花粉、灰尘或动物皮毛等过敏，而这些过敏源接触到眼睛时，会引起眼睛红肿。过敏反应通常还伴随着眼痒、流泪和疼痛的症状。

Allergic reaction. Some people are allergic to pollen, dust, or animal fur in the air, and when these allergens come into contact with the eyes, they can cause redness and swelling. Allergic reactions are usually accompanied by symptoms such as itching, tearing, and pain in the eyes.

三、疾病或感染。眼睛红肿也可能是某种眼部疾病或感染的症状。例如，结膜炎是一种常见的眼部感染，它会导致眼球外层的血管扩张，引起眼睛发红和肿胀。

Disease or infection. Redness and swelling of the eyes could also be a symptom of an eye disease or infection. For example, conjunctivitis is a common eye infection that causes dilated blood vessels in the outer layer of the eyeball, resulting in redness and swelling.

四、眼镜不合适。佩戴不合适的眼镜或隐形眼镜可能导致眼睛红肿。如果眼镜度数不准确或者隐形眼镜不清洁或使用时间过长，都有可能刺激眼部组织，引起红肿不适。

Improper eyewear. Wearing ill-fitting glasses or contact lenses can also cause redness and swelling of the eyes. If the prescription of the glasses is inaccurate or if the contact lenses are not clean or worn for too long, they can irritate the eye tissues and cause redness and discomfort.

五、缺乏睡眠。长期缺乏充足的睡眠会导致眼睛疲劳和红肿。睡眠不足会使眼部肌肉紧张，血液循环不畅，进而导致眼睛发红和水肿。

Lack of sleep. Prolonged lack of sufficient sleep can lead to eye fatigue and redness and swelling. Insufficient sleep can cause tension in the eye muscles, poor blood circulation, and consequently, redness and puffiness of the eyes.

六、环境因素。烟草烟雾、空气污染、干燥的气候以及强烈的阳光等环境因素也可能引起眼睛红肿。这些因素会刺激眼睛，并导致眼球周围组织发生炎症反应。

Environmental factors. Environmental factors such as tobacco smoke, air pollution, dry climates, and intense sunlight can also cause redness and swelling of the eyes. These factors can irritate the eyes and cause inflammation in the surrounding tissues of the eyeball.

了解到这些可能的原因后，我们可以采取一些措施来减轻眼睛红肿。首先，避免长时间用眼，定期休息或运用20-20-20法则：每隔20分钟，将目光转移到20英尺远的地方，并保持20秒。此外，保持环境清洁，避免接触过敏原，并定期检查眼镜和隐形眼镜的适配度。如果红肿情况持续或伴有其他症状，应及时就医咨询。

Understanding these possible causes, we can take some measures to alleviate redness and swelling of the eyes. Firstly, avoid excessive eye strain and take regular breaks or use the 20-20-20 rule: every 20 minutes, shift your gaze to something 20 feet away for 20 seconds. Additionally, maintain a clean environment, avoid contact with allergens, and regularly check the fit of glasses and contact lenses. If the redness and swelling persist or are accompanied by other symptoms, it is advisable to seek medical advice promptly.

总之，眼睛红肿可能是由多种因素引起的，包括过度用眼、过敏反应、疾病感染、不合适的眼镜、缺乏睡眠和环境因素等。通过了解这些原因，我们可以采取适当的预防和治疗措施来减轻这一症状的不适。

In conclusion, redness and swelling of the eyes can be caused by various factors including excessive eye strain, allergic reactions, disease infections, improper eyewear, lack of sleep, and environmental factors. By understanding these causes, we can take appropriate preventive and treatment measures to alleviate the discomfort associated with this symptom.