> "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.

Pouvons-nous faire des tatouages à la fois beaux et fonctionnels ? Le nanotechnologue Carson Bruns fait part de son travail pour créer des tatouages high-tech qui réagissent à leur environnement -- comme de l'encre changeant de couloir et pouvant vous dire quand vous êtes en train d'attraper un coup de soleil -- et montre des façons prometteuses dont ils pourraient nous fournir des informations sur notre santé en temps réel.

Un tatouage pourrait-il vous aider à rester en bonne santé ?

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.