What Causes Scar Tissue On Uterus? | Causes And Risk

Hearing that you may have scar tissue on your uterus can feel scary and confusing. You might worry about pain, periods, fertility, and you want information in one place.

Most uterine scar tissue follows clear events such as surgery or infection. Doctors understand these patterns and how to treat them. This guide explains what causes scar tissue on uterus and when to ask for medical help.

What Causes Scar Tissue On Uterus? Categories

Scar tissue forms when the body repairs an injury. Inside the uterus, this repair process can stick the inner walls together or leave bands of fibrous tissue. Doctors often call this “intrauterine adhesions” or Asherman syndrome when the scar tissue distorts the cavity of the uterus.

Most cases come from procedures inside a recently pregnant uterus, but other triggers also matter. The table below gives a quick overview of the main causes of scar tissue on the uterus.

Cause Category	Typical Trigger	How It Leads To Scar Tissue
Pregnancy-related uterine procedures	Dilation and curettage (D&C) after miscarriage, abortion, or retained placenta	Scraping a recently pregnant lining can damage the basal layer and form adhesions.
Non-pregnancy uterine surgery	Fibroid or polyp removal, septum repair, endometrial ablation	Instruments or energy devices can leave patches of scar tissue on the lining.
Cesarean birth and other uterine incisions	Cut in the uterine wall during C-section or other operations	The muscular wall heals with scar along the cavity or the outer surface.
Infection inside the uterus	Postpartum infection, pelvic inflammatory disease, genital tuberculosis	Inflamed endometrium can be destroyed in patches, and healing may form adhesions.
Endometriosis and pelvic adhesions	Endometrial-like tissue around the uterus, repeat pelvic surgery	Scar tissue may tether the outside of the uterus or nearby organs.
Radiation or other treatments	Pelvic radiation, uterine artery procedures	Tissue damage from treatment can thin the lining and leave stiff areas.
Congenital or rare conditions	Infection such as schistosomiasis or tuberculosis in some regions	Long-term inflammation of the lining can end in widespread scarring.
Foreign bodies in the uterus	Long-retained intrauterine device (IUD) or surgical material	Chronic irritation around the device can trigger local scar formation.

Pregnancy-Related Uterine Procedures

Worldwide, the most common cause of scar tissue inside the uterine cavity is a dilation and curettage (D&C) performed after pregnancy. Studies suggest that over nine out of ten cases of Asherman syndrome follow procedures in a uterus that was pregnant within the past few weeks or months.

A D&C may follow an early pregnancy loss, elective termination, or a placenta that stays attached after birth. Scraping or suction can injure the deepest layer of the endometrium, and during healing the uterine walls may stick together and form adhesions.

The risk of dense scar tissue rises with repeated procedures, heavy bleeding, or infection at the same time. Timing also matters: a uterus shortly after pregnancy is softer and more vulnerable to injury than at other times in the cycle.

Non-Pregnancy Uterine Surgery

Scar tissue on the uterus can also form after procedures that are not tied to pregnancy. Hysteroscopic surgery to remove fibroids or polyps, reshape a uterine septum, or control heavy bleeding with endometrial ablation all work inside the uterine cavity.

Any time instruments, heat, or cutting devices touch the endometrium, there is a chance that raw surfaces will face each other while they heal. If those surfaces heal together instead of separately, adhesions can cross the cavity like internal bridges.

Laparotomy or laparoscopic surgery on the uterus, including myomectomy or repair after uterine rupture, can leave scar along the muscular wall. That scar may sit on the outside of the uterus, inside the cavity, or both.

Cesarean Birth And Uterine Incisions

A cesarean birth involves an incision through the uterine wall to deliver the baby. The incision closes with sutures that leave a firm line of scar tissue in the muscle.

Most people heal without any problem in the cavity itself. In some cases, the incision area creates a small pouch or niche that can collect menstrual blood and lead to spotting or pain. Rarely, adhesions form inside the cavity near the scar, especially if there was infection or additional procedures around the time of the birth.

Infection And Inflammation Inside The Uterus

Infection of the uterine lining, called endometritis, can damage the cells that rebuild the endometrium after each cycle. Severe postpartum infection, pelvic inflammatory disease, or infections such as tuberculosis of the genital tract may leave patches of lining that no longer regenerate well.

When these damaged areas heal, they may form tough fibrous surfaces instead of soft lining. The walls can then stick together where they touch. Patient leaflets from reproductive medicine groups describe how injury and infection of the endometrium can lead directly to intrauterine adhesions.

Endometriosis And Pelvic Adhesions

Endometriosis places tissue similar to the uterine lining on the outer surface of the uterus, ovaries, and nearby organs. Each cycle, that tissue can bleed and irritate the surrounding peritoneum, leading to patches of scar that tether structures together.

These adhesions sit on the outside of the uterus instead of inside the cavity, yet they can still restrict movement, trigger pain, and interfere with fertility. Surgery for endometriosis, fibroids, or even appendectomy can also leave adhesions between the uterus and neighboring organs.

Radiation And Other Less Common Triggers

Pelvic radiation for cancer treatment can thin the endometrium and damage small blood vessels, so the cavity may shrink and scar over time. Other reported causes include uterine artery embolization, uterine compression sutures for severe postpartum bleeding, and rare inflammatory conditions that injure the basal layer and may heal with fibrous tissue instead of healthy lining.

Symptoms Linked To Uterine Scar Tissue

Not everyone with uterine scar tissue has clear symptoms. Some people find out only during fertility evaluation or imaging done for another reason. Others notice changes that start after a specific surgery, delivery, or infection.

Common patterns include lighter periods, missing periods with cramping, pelvic pain, trouble getting pregnant, or pregnancy loss. These signs do not prove that scar tissue is present, but they raise suspicion, especially if they begin after a known uterine event.

Menstrual Changes And Pelvic Pain

Scar tissue inside the cavity can block part or all of the outlet for menstrual blood. Periods may become much lighter or stop completely. Some people feel strong cramps each month without much bleeding because blood is trapped behind the adhesions.

Pain may also come from adhesions that pull on the uterine wall or nearby organs. Pelvic pain has many causes, so doctors use your history, exam, and imaging to sort out whether scar tissue is likely.

Fertility And Pregnancy Concerns

Intrauterine adhesions can make it harder for an embryo to implant in the right spot or receive enough blood flow from the lining. This can lead to infertility, early miscarriage, or problems with the placenta in later pregnancy such as placenta accreta spectrum.

Scar Tissue On Uterus Causes And Risks

When people ask what causes scar tissue on uterus after an injury, doctors point to a few factors. Some can be changed, others cannot, and knowing them can help you talk with your doctor.

Risk Factor	Why It Raises Risk	What To Discuss With Your Doctor
Number of uterine procedures	Each D&C or hysteroscopic surgery adds another healing cycle.	Ask whether less invasive options exist before a repeat procedure.
Timing after pregnancy	A recently pregnant uterus is softer and more prone to injury.	Ask about the safest timing for procedures when possible.
Presence of infection	Infection damages endometrial cells and disrupts normal healing.	Report fever, foul discharge, or severe pain promptly after any procedure.
Extent of surgery	Large areas of lining removed or treated create wider raw surfaces.	Ask how much tissue will be treated and how adhesions are prevented.
Underlying conditions	Endometriosis, bleeding disorders, or placental problems can complicate healing.	Share your full medical history before any uterine procedure.
Type of instruments or energy	Certain tools may cause deeper burns or cuts than others.	Ask whether your surgeon uses methods to limit adhesions.
Previous pelvic surgery	Existing adhesions can distort anatomy and raise the chance of new scars.	Bring records from prior operations so your surgeon can plan safely.

How Doctors Diagnose And Treat Uterine Scar Tissue

Doctors usually start with a detailed history and pelvic exam, then choose imaging based on your symptoms. Transvaginal ultrasound, saline infusion sonography, or an X-ray study called hysterosalpingography can suggest that adhesions are present.

Hysteroscopy, where a tiny camera passes through the cervix into the uterus, is the best way to see intrauterine adhesions directly and judge how extensive they are. Professional groups have issued practice guidelines on hysteroscopic removal of adhesions and report that this can restore the cavity for many patients.

Treatment choices depend on symptoms and goals. Some people with mild scar tissue and no symptoms may only need monitoring, while others benefit from hysteroscopic surgery, a temporary device in the uterus to keep the walls apart, and hormone therapy to help the lining regrow.

If you have questions about a past D&C or uterine surgery, you can ask your clinician about the risk of intrauterine adhesions and whether any further evaluation would help. Health pages from major hospitals and professional groups give background that you can read before or after your visit.