Here are a few options for a WordPress post tag description for “過敏反應” (Guòmǐn Fǎnyìng – Allergic Reaction) in Traditional Chinese, depending on the specific context and intended audience:

**Option 1: Concise & General**

* **Description:** 身體對某些物質產生的過度反應。 (Shēngtǐ duì mǒu xiē wùzhí chǎnshēng de guòdù fǎnyìng.) – **Translation:** An excessive reaction of the body to certain substances.
* **Use Case:** Suitable for a general medical or health blog.

**Option 2: Focus on Symptoms**

* **Description:** 可能引起皮膚瘙癢、紅疹、呼吸困難等症狀。 (Kě néng yǐnqǐ pífū sàoyǎng, hóngzhěn, hūxī kùnnán děng zhèngzhuàng.) – **Translation:** May cause symptoms such as skin itching, rash, and difficulty breathing.
* **Use Case:** Useful if the blog post details symptoms specifically.

**Option 3: Focus on Causes and Triggers**

* **Description:** 了解過敏反應的成因、觸發物，以及應對方法。 (Liǎojiě guòmǐn fǎnyìng de chéngyīn, chùfāwù, yǐjí yīngduì fāngfǎ.) – **Translation:** Learn about the causes, triggers, and management of allergic reactions.
* **Use Case:** Appropriate if the posts cover triggers like food, pollen, etc., as well as their effects.

**Option 4: Friendly & Helpful**

* **Description:** 有關過敏反應的資訊，幫助你了解如何處理和預防。 (Yǒuguān guòmǐn fǎnyìng de zīxùn, bāngzhù nǐ liǎojiě rúhé chǔlǐ hé yùfáng.) – **Translation:** Information about allergic reactions, to help you understand how to manage and prevent them.
* **Use Case:** Suitable for a friendly and approachable blog aiming to give information.

**Option 5: More technical (adjust for audience)**

* **Description:** 免疫系統對無害物質的異常反應，可以通過多種方式表現出來。 (Miǎnyì xìtǒng duì wúhài wùzhí de yìcháng fǎnyìng, kěyǐ tōngguò duōzhǒng fāngshì biǎoxiàn chūlái.) – **Translation:** Aberrant response of the immune system to harmless substances, which can manifest in various ways.
* **Use Case:** Useful if the audience are doctors or in the medical field

**Important Considerations when choosing:**

* **Your Blog’s Theme:** Choose a description that aligns with the overall tone of your blog (scientific, casual, etc.).
* **Target Audience:** Consider the level of medical knowledge of your readers.
* **Content of Posts Using This Tag:** The description should effectively summarize the content tagged with “過敏反應.”

I recommend choosing the description that best fits your content and audience. You can also adjust any of these to fit your specific needs. Remember to keep it concise and easy to understand for the best results!