Vaseline (petroleum jelly) is a safe and helpful option for anal fissures, particularly in the early stages. It works by sealing moisture into the damaged tissue and creating a protective barrier that shields the tear from irritation during bowel movements. The Cleveland Clinic lists petroleum jelly among recommended topical treatments for fissures, noting it can promote healing and act as an antibiotic barrier.
Most anal fissures are acute, meaning they developed recently, and the good news is that conservative treatment (no surgery) works well. A study of 165 patients found that about 74% experienced symptom relief within two weeks of conservative care, and by six weeks, nearly 98% had healed completely.
How Vaseline Helps a Fissure Heal
An anal fissure is a small tear in the lining of the anus, usually caused by passing hard or large stools. The area is constantly exposed to moisture, friction, and bacteria, which makes healing difficult compared to a cut on your arm. Petroleum jelly addresses several of these problems at once.
First, it locks in the tissue’s natural moisture, which prevents the tear from drying out and cracking further. Dry wounds heal more slowly, so this barrier effect matters. Second, it creates a slippery layer that reduces friction when stool passes over the fissure, which is often the moment that re-injures the tear and restarts the cycle of pain. Third, the occlusive seal helps keep bacteria from penetrating deeper into the wound.
Vaseline won’t actively relax the sphincter muscle or increase blood flow to the area the way prescription ointments do. That’s an important distinction. For fissures that don’t respond to basic care, a doctor may prescribe a topical treatment that relaxes the internal sphincter, reducing pressure and allowing more blood to reach the wound. Vaseline is a first-line comfort measure, not a replacement for those medications if you need them.
How to Apply It
Apply a pea-sized amount of petroleum jelly directly to the skin at the anal opening twice daily. You don’t need to push it deep inside the canal. The fissure is typically right at or just inside the anal verge, so gentle external application covers the area.
Applying after a bowel movement is especially useful, since that’s when the tear is most irritated and exposed. Gently clean the area first with warm water (not soap, which can sting and dry the tissue), pat dry with a soft cloth, and then apply the Vaseline. A second application before bed helps protect the area overnight.
If you find that wiping with toilet paper reopens the tear or causes pain, switching to unscented baby wipes or rinsing with a handheld bidet can make a significant difference.
What Else Speeds Up Healing
Vaseline works best as part of a broader approach. The fissure formed because something tore the tissue, usually a hard stool, so preventing that from happening again is the most important step.
Fiber intake: Aim for 25 to 35 grams of fiber per day through foods like beans, oats, fruits, and vegetables, or a fiber supplement like psyllium husk. Fiber softens stool and adds bulk, which reduces straining. Increase gradually over a week or two to avoid bloating.
Water: Fiber only works if you’re drinking enough fluid. Six to eight glasses of water a day keeps stool soft enough to pass without re-tearing the fissure.
Sitz baths: Sitting in a few inches of warm water for 15 to 20 minutes relaxes the sphincter muscles and increases blood flow to the area. Three to four times a day is ideal during an active flare. You can buy a plastic sitz bath basin that fits over your toilet seat, or simply use your bathtub.
Don’t delay bowel movements: Holding stool in allows more water to be absorbed, making it harder and more likely to re-injure the fissure. Go when you feel the urge.
When Vaseline Isn’t Enough
If your fissure hasn’t improved after four to six weeks of consistent home care, it may have become chronic. Chronic fissures develop scar tissue and reduced blood supply around the tear, which makes them resistant to simple measures like petroleum jelly and fiber.
Signs a fissure may need more than home care include pain that lasts hours after a bowel movement, visible skin tags near the tear, bleeding that isn’t improving, or a fissure that keeps reopening after seeming to heal. At that point, prescription topical treatments that relax the sphincter muscle are the typical next step. These work by lowering the pressure inside the anal canal, which restores blood flow and lets the tissue finally close.
Surgery is reserved for fissures that fail all other treatments. The procedure involves a small cut in the internal sphincter muscle to permanently reduce pressure, and it has a high success rate, but it carries a small risk of affecting continence, so it’s considered a last resort.
Vaseline vs. Other Over-the-Counter Options
You’ll find several OTC products marketed for anal discomfort, and it helps to know what each one actually does. Petroleum jelly is purely a barrier and lubricant. It doesn’t contain numbing agents or anti-inflammatory ingredients.
- Zinc oxide creams (like diaper rash cream) also form a protective barrier and can soothe irritated skin. They work similarly to Vaseline but with a thicker consistency.
- Lidocaine-based creams numb the area temporarily, which can help with pain before or after a bowel movement but don’t contribute much to actual healing.
- Hydrocortisone creams reduce inflammation and itching but should not be used for more than a week or two, as prolonged use thins the skin and can make the problem worse.
For straightforward fissure care, plain petroleum jelly is a reliable, inexpensive choice. It’s free of fragrances and additives that could irritate broken skin, and it’s safe to use for as long as you need it without risk of tissue thinning.