Here are a few options for a WordPress post tag description for “內外寄生蟲” (Internal and External Parasites), written in Traditional Chinese, catering to different levels of detail and SEO considerations:

**Option 1: Concise & Direct (Best for quick identification)**

> 了解寵物常見的內外寄生蟲問題，包括虱子、跳蚤、蜱蟲、蛔蟲、絛蟲，以及如何防治。
>
> *[Translation: Understanding common internal and external parasite problems in pets, including lice, fleas, ticks, roundworms, tapeworms, and how to prevent them.]*

**Benefits:** Short, clear, and easily understood. Excellent for users who know what they are looking for. Good for a general tag.

**Option 2: Slightly more detailed (Provides more context)**

> 內外寄生蟲（如跳蚤、壁蝨、蛔蟲等）可能對寵物造成健康威脅。此標籤涵蓋了辨識、治療和預防這些寄生蟲感染的相關資訊，讓您保護愛寵免受侵害。
>
> *[Translation: Internal and external parasites (such as fleas, ticks, roundworms, etc.) can pose a health threat to pets. This tag covers information related to identifying, treating, and preventing these parasitic infections, allowing you to protect your beloved pets from harm.]*

**Benefits:** Provides enough information to grab the user’s attention and let them know what to find. Good for SEO because it includes relevant keywords.

**Option 3: Most SEO-optimized & comprehensive (Best for search engines)**

> 內外寄生蟲是威脅寵物健康的常見問題。此標籤包含有關動物的寄生蟲感染資訊，包括常見種類（如跳蚤、壁蝨、蜱蟲、蛔蟲、絛蟲、鉤蟲、心絲蟲等）、症狀、診斷方法、治療方案、預防措施，以及如何保護您的寵物免受這些有害生物的侵害。 查找詳細資訊，了解如何維護寵物的健康與幸福。
>
> *[Translation: Internal and external parasites are a common problem that threatens the health of pets. This tag contains information on parasitic infections in animals, including common types (such as fleas, ticks, lice, ticks, roundworms, tapeworms, hookworms, heartworms, etc.), symptoms, diagnostic methods, treatment options, preventative measures, and how to protect your pet from these harmful creatures. Find detailed information and learn how to maintain your pet’s health and well-being.]*

**Benefits:** Most detailed and includes many relevant keywords (e.g., different parasite types, symptoms, treatment). Improves SEO as it likely ranks better in search engines.

**Option 4: Short & Sweet with a Call to Action**

> 探索有關狗狗和貓咪常見內外寄生蟲的資訊。學習如何預防和治療，保護您的毛孩健康！
>
> *[Translation: Explore information about common internal and external parasites in dogs and cats. Learn how to prevent and treat them, to protect the health of your furry friends!]*
**Benefits:** Fast, easy to read, and makes a quick impression.

**Key Considerations for Choosing:**

* **Blog’s Focus:** Is your blog heavily focused on pet health? More specific is fine then. If it’s a general blog, the broader options are better.
* **Target Audience:** Who are you trying to reach? Less scientific language for everyday pet owners.
* **SEO Strategy:** Choose the description that optimizes for keywords the audience uses to search for information about parasite treatments.

**To use in WordPress:**

1. In your WordPress admin panel, go to **Posts > Tags**.
2. Either create a new tag or edit the existing “內外寄生蟲” tag.
3. Fill in the “Description” field with the chosen text.
4. Optional: Fill in the “Slug” field, which auto-generates from the title. You can edit it to make it cleaner (e.g., `neiwai-jishengchong`).

Choose the description that best suits your needs, and remember to tailor it to your specific content.