> "Normal human body temperature is about 97 to 99 degrees Fahrenheit, and if you fall outside of that range, you need to seek medical attention right away."

Correction: The most common cause of a fever is [infection](https://www.uofmhealth.org/health-library/hw198785). Because a fever is the body's natural response to fight off an infection, it does [not always require immediate medical attention](https://www.fda.gov/consumers/consumer-updates/when-give-kids-medicine-coughs-and-colds). For an adult, a fever is not usually a cause for concern unless it reaches 103 degrees Fahrenheit. For infants, however, any fever may be a cause for concern.

タトゥーはただ美しいだけでなく、機能性も備えたものになり得るでしょうか？ ナノテクノロジー研究者のカーソン・ブランズが、先端技術を用いたタトゥーの研究を紹介します。これは環境により変化するもので、例えば、色が変わることで日焼けしていることがわかるインクなどが挙げられています。タトゥーを利用することで、自分の健康状態を常に確認できるようになるかもしれないと、彼は語ります。

タトゥーが健康にもたらすもの

Tattoos have existed for over 5,000 years, as seen on Ötzi the Iceman, whose preserved skin bears 61 black tattoos predating the Egyptian pyramids. Today, tattoos are not just art or identity—they can become functional tools using nanotechnology. Color-changing inks can signal sunburn risk or body temperature shifts, turning skin into a real-time health monitor. This leap promises a future where tattoos are beautiful and life-enhancing.