Here’s a description for the WordPress tag “體重過低” tailored for Traditional Chinese:

**Description:**

**體重過低** (Tǐzhòng guò dī) – 涵蓋與體重過輕、營養不足、以及可能導致的健康問題相關的所有文章話題。 包括：
* **體重過輕的原因:** 例如營養不良、疾病、飲食失調等。
* **健康風險:** 探討體重過輕對身體造成的潛在危害，例如免疫力下降、骨質疏鬆等。
* **改善方法:** 提供健康增重策略、營養建議、飲食規劃，以及尋求專業協助的資訊。
* **相關建議:** 針對不同人群、不同體重過輕原因提供飲食及生活方式小貼士。

**(English Translation – for context, not display):**

**(Underweight) – This tag covers all articles related to being underweight, undernutrition, and potential health problems resulting from it. This includes:
* **Causes of being underweight:** Such as malnutrition, illness, eating disorders, etc.
* **Health risks:** Exploring the potential harms that being underweight can cause to the body, such as reduced immunity, osteoporosis, etc.
* **Improvement methods:** Providing healthy weight gain strategies, nutritional advice, meal planning, and information on seeking professional help.
* **Related advice:** Providing dietary and lifestyle tips for different groups of people and different causes of being underweight.)**

**Why this description is effective:**

* **Clear and Concise:** Directly states the tag’s meaning.
* **Comprehensive:** Covers both causes, health risks, and potential solutions.
* **Relevant Keywords:** Uses key terms that people are likely to search for (e.g., 營養不足, 健康風險, 改善方法).
* **Practical:** Emphasizes both understanding the problem and providing practical advice.
* **Translated for Context:** Though the description is meant for Chinese readers, the English translation provides context for anyone managing the website.
* **Emphasis on Professional Help:** Acknowledges the importance of seeking professional guidance.
* **Clear Language:** Uses straightforward, easily understandable language.
* **User-Focused:** Keeps the reader in mind, describing what they likely wish to find through the tag.

This description will help your readers quickly understand what the “體重過低” tag is about and whether the content tagged with it will be useful to them. Remember to add this description when you create or edit the tag within your WordPress backend.