Frenulum is a soft mucous membrane which is located between gums tissue and tongue, lips and cheeks and which limits the movement by connecting them to each other.
Frenulum is mostly located between upper and lower central incisors, between molars and cheeks, and under the tongue.
This is a feature which differs from one person to another. In addition to existing under the tongue in almost everyone, multiple frenula exists above upper and lower central incisors and on backside of the cheek area.
They may cause gum recession and gum diseases by pulling gums down especially when they are larger and thicker than normal and located too close to the edge of the teeth. Being larger and thicker than normal, frenulum, which is located under the tongue, may cause speech problems in children.