UFC fighters (and cornermen/cutmen) put Vaseline on their face to reduce friction, protect the skin, and help prevent cuts and swelling during the fight.

Why it’s used before the fight

Before stepping into the Octagon, a cutman applies a thin layer of petroleum jelly (Vaseline) mostly on the forehead, cheeks, and around the eyes. This does a few important things:

  • Reduces friction – Vaseline makes the skin more slippery so punches, elbows, and knees glance off instead of “grabbing” the skin, which lowers the chance of cuts and abrasions.
  • Makes skin stretchier – Dry, tight skin is more likely to tear when hit; Vaseline keeps it soft and elastic so it can absorb impacts better without splitting open.
  • Forms a protective barrier – It acts like a mini shield that helps the skin slide over glove leather and other skin, reducing blunt trauma and bruising.

Why it’s reapplied between rounds

During the fight, cutmen often reapply Vaseline between rounds, especially if the fighter has been cut or is taking a lot of shots to the face. This helps:

  • Minimize bleeding from cuts – Vaseline can help seal small lacerations temporarily, slowing blood flow so the cutman can keep the wound clear and the doctor might allow the fight to continue.
  • Reduce swelling – A slick layer can slightly cushion the area and reduce additional trauma, which helps keep swelling down.
  • Keep sweat and blood from spreading – Vaseline can help keep sweat and blood from running into the eyes or across the face, which improves visibility and comfort.

Rules and limits

There are strict rules about how and where Vaseline can be used:

  • Only the face (not the body) can be greased; putting Vaseline on the limbs or torso is illegal because it makes grappling and submissions too difficult.
  • The amount is controlled by the cutman and sometimes by a referee to prevent one fighter from becoming “too slippery” and unfairly slipping out of holds.
  • If a fighter tries to apply too much (or rubs it on the wrong area), the referee can stop it and even penalize the corner.

In simple terms

Think of Vaseline like a slick, protective “armor” for the face: punches slide off instead of tearing the skin, and small cuts can be managed so the fighter can keep going. It’s not a magic healing goo, but a practical, well‑established way to stay safe and stay in the fight longer.

Bottom line: UFC fighters use Vaseline mainly to prevent cuts, reduce swelling, and keep the skin from tearing , with cornermen carefully managing how much and where it’s applied so it stays fair and legal.

<tldr_bottom>TL;DR: UFC fighters put Vaseline on their face to make the skin slippery and elastic, so punches slide off instead of cutting it, which helps prevent cuts and swelling during the fight.</tldr_bottom>