TIGHT FRENULUM
A short frenulum (also known as frenulum breve) is when the frenulum of the penis is so short that it restricts the movement that the foreskin can make – the frenulum should be long enough to allow the foreskin to retract smoothly, but a short frenulum often makes this impossible. This causes discomfort during sexual intercourse.
Also, it can make maintaining hygiene difficult, as it can make it difficult to clean under the foreskin, increasing the risk of infections.