Useless fact
What is the skin under your tongue called?
The small, thin fold of tissue that connects the underside of your tongue to the floor of your mouth is called the lingual frenulum.
The term lingual frenulum comes from the Latin word frenulum, meaning a small bridle, which aptly describes its role in anchoring the tongue. Historically, this anatomical feature has been recognized since ancient times, as physicians studied how its shape and size affect speech and infant feeding. In some individuals, this fold of tissue is unusually short or tight from birth, a congenital condition medically known as ankyloglossia, or more commonly referred to as being tongue-tied. This condition can restrict the tongue's range of motion, making it difficult for infants to breastfeed properly and sometimes leading to speech challenges later in childhood. To resolve severe cases, a minor surgical procedure called a frenotomy or frenuloplasty is performed to snip or release the tissue, restoring normal mobility. Aside from the tongue, the human body contains several other frenula, including those located inside the upper and lower lips, as well as in other anatomical regions, all serving a similar function of limiting the movement of highly mobile organs.
Why this is true — The anatomical term for this structure is the lingual frenulum, as documented in medical reference materials.
Sources
- Anatomy, Head and Neck, Lingual Frenulum National Library of Medicine