Most anal fissures during pregnancy heal with conservative treatment: softening your stool, reducing pain, and giving the tear time to close on its own. About 80% of acute fissures (those present for less than six weeks) heal within six weeks using these methods. The key is starting early, because healing rates drop significantly the longer a fissure persists.
Pregnancy makes fissures more likely for several overlapping reasons. Rising progesterone slows your digestive tract, leading to harder stools. The growing uterus puts increasing pressure on pelvic blood vessels, reducing circulation to the anal area. Constipation and straining during bowel movements then create or worsen small tears in the anal lining. The good news is that most treatments revolve around breaking this cycle, and the safest options are also the most effective for acute fissures.
Fiber and Fluids: The Foundation
Soft, bulky stools are the single most important factor in healing a fissure. The recommended fiber intake during pregnancy is 28 grams per day, but fewer than 30% of pregnant women actually reach that target. Closing that gap can make a dramatic difference in stool consistency.
Practical ways to get there include adding beans, lentils, berries, pears, oats, and whole grain bread to your meals. A fiber supplement like psyllium husk can help bridge the remaining gap. Increase fiber gradually over a week or two to minimize bloating and gas. Pair the extra fiber with at least eight to ten glasses of water daily, since fiber without enough fluid can actually make constipation worse.
Stool Softeners That Are Safe in Pregnancy
When dietary changes alone aren’t enough, a stool softener can help. Docusate sodium is the most commonly recommended option during pregnancy. Multiple studies have found no association with adverse effects, and it works by drawing water into stool rather than stimulating the bowel. One precaution: chronic daily use throughout an entire pregnancy has been linked in a single case report to low magnesium in the newborn, so it’s best used as a short-term tool while you build up dietary fiber.
Osmotic laxatives like lactulose and polyethylene glycol (often sold as MiraLAX) are also options. Both are poorly absorbed into the bloodstream and have not been associated with harmful effects. They can cause bloating and gas, and prolonged use carries a theoretical risk of electrolyte imbalance, so occasional or short-term use is preferred. Stimulant laxatives (like senna) should similarly be kept to occasional use only.
Sitz Baths for Pain and Healing
A sitz bath is one of the simplest, most effective things you can do. Fill a basin or shallow tub with warm water, around 104°F (40°C), and soak your anal area for 15 to 20 minutes. Doing this two to three times a day, and especially after bowel movements, relaxes the muscles around the fissure, increases blood flow to the area, and reduces pain. You don’t need to add anything to the water, though some people find a small amount of Epsom salt soothing. Pat the area dry gently afterward rather than rubbing.
Topical Pain Relief
Topical lidocaine ointment is considered safe during pregnancy for short-term use. Applied directly to the fissure before or after bowel movements, it numbs the area enough to reduce the pain-spasm cycle that keeps fissures from healing. Avoid using it continuously for weeks, as prolonged application can cause skin sensitization.
Witch hazel pads (like Tucks) are another option for soothing inflammation and irritation around the anal area. These are widely recommended during pregnancy for both hemorrhoids and fissures and can be applied as often as needed.
Prescription Topical Treatments
If a fissure doesn’t respond to the measures above within a few weeks, your provider may consider a prescription topical cream. Calcium channel blocker creams, typically diltiazem 2%, work by relaxing the tight muscle around the anus, improving blood flow and allowing the tear to heal. These medications are used routinely in pregnancy for other purposes like managing high blood pressure and preterm labor. Available safety data on their use during pregnancy have not shown increased risks of birth defects, miscarriage, or growth problems, though the data specifically for topical anal application is limited.
Nitroglycerin ointment is another prescription option commonly used for fissures outside of pregnancy, but it carries a meaningful downside: it can lower blood pressure and cause lightheadedness, dizziness, and headaches. Since blood pressure fluctuations are already a concern during pregnancy, and there are no studies on its rectal use in pregnant women specifically, many providers prefer diltiazem or skip this option altogether.
Treatments to Avoid During Pregnancy
Botulinum toxin injections, sometimes used for chronic fissures that resist other treatments, are contraindicated during pregnancy and breastfeeding. The toxin works by paralyzing muscle, and its effects on a developing baby have not been established as safe.
Surgery for anal fissures (lateral internal sphincterotomy) is the gold standard for chronic fissures in non-pregnant patients, but it is not a first-line approach during pregnancy. The procedure involves cutting a small portion of the anal sphincter muscle, and the risks of anesthesia, infection, and potential incontinence make it something to defer until after delivery whenever possible. Most providers will exhaust all conservative and topical options first and revisit surgery postpartum if the fissure persists.
What to Expect During Healing
Timing matters significantly. Fissures treated within the first month of symptoms have healing rates close to 100% with conservative care. Once symptoms have lasted beyond six months, that rate drops to roughly one in three. Pain typically improves before the fissure is fully healed. In one study, patients with acute fissures saw their pain scores drop from nearly 9 out of 10 to less than 1 out of 10 after six weeks of treatment.
Many pregnancy-related fissures also improve after delivery, once the hormonal slowdown of digestion reverses and pelvic pressure decreases. If your fissure developed late in pregnancy, it may continue healing in the postpartum period even without additional intervention, as long as you maintain soft stools.
Daily Habits That Prevent Recurrence
Healing a fissure and preventing it from returning require the same strategies. Avoid straining during bowel movements. If you don’t feel a strong urge, don’t force it. When you do go, keep the time on the toilet short. Respond to the urge promptly rather than delaying, since waiting allows the stool to dry out and harden in the rectum.
Gentle physical activity like walking helps stimulate bowel motility. Even 20 to 30 minutes of daily walking can reduce constipation. Keep the anal area clean and dry, using unscented wipes or rinsing with water instead of dry toilet paper, which can irritate a healing fissure. Wearing loose, breathable cotton underwear also helps reduce moisture and friction in the area.