Pregnancy hernia

Pregnancy hernia is a pathological protrusion of abdominal cavity contents (most often fragments of the intestine or adipose tissue) through weakened structures of the abdominal walls, which manifests or intensifies during pregnancy. This phenomenon results from a physiological increase in intra-abdominal pressure, stretching of the rectus abdominis muscles, and hormonal changes affecting the connective tissue. Hernias in pregnancy are most commonly located in the umbilical area or the linea alba, and their presence may be asymptomatic or cause pain. In most cases, the course is mild, but it requires monitoring due to the risk of complications, such as hernia incarceration.

Umbilical hernia in pregnancy

Umbilical hernia in pregnancy is the most common type of hernia observed in pregnant women. It occurs within the umbilical ring, which physiologically represents a site of reduced strength of the abdominal wall. During pregnancy, it undergoes additional stretching due to the enlarging uterus and increased intra-abdominal pressure.

The main factors contributing to the development of an umbilical hernia include:

multiple pregnancies (multiple or subsequent pregnancies),
significant weight gain,
weakening of the abdominal muscles (e.g., separation of the rectus abdominis muscles – diastasis recti),
genetic predispositions related to the quality of connective tissue,
previous surgeries within the abdominal cavity.

The clinical picture usually includes:

a soft, flexible bulge in the umbilical area,
enlargement of the lesion during coughing, laughing, or exertion,
the possibility of reducing the hernia into the abdominal cavity in the initial stages.

In most cases, an umbilical hernia in pregnancy does not require immediate surgical intervention and remains under observation. Surgical treatment is considered after the pregnancy has ended or in situations of complications. During pregnancy, conservative management is recommended, including:

weight gain control,
avoiding excessive increases in intra-abdominal pressure,
using abdominal support belts,
physiotherapy aimed at stabilizing deep muscles.

Pregnancy hernia – symptoms

Symptoms of a pregnancy hernia depend on its size, location, and degree of advancement. In many cases, the course is paucisymptomatic; however, as the pregnancy progresses, the symptoms may intensify.

The most commonly observed symptoms include:

a visible or palpable bulge in the abdomen (most often in the umbilical area),
a feeling of pulling, pressure, or discomfort,
pain intensifying during physical exertion, coughing, or prolonged standing,
an increase in symptoms at the end of the day.

In complicated situations, warning symptoms may appear, requiring an urgent surgical consultation:

sudden, severe pain within the hernia,
hardness and inability to reduce the bulge,
nausea, vomiting,
symptoms of bowel obstruction.

The mechanism of symptom formation is related to the displacement of the abdominal cavity contents through weakened fascial structures and the irritation of tissues. In advanced cases, hernia incarceration occurs—a situation in which the hernia contents cannot return to the abdominal cavity, which can lead to tissue ischemia.

Therapeutic management depends on the severity of the symptoms. In most cases, conservative treatment is used during pregnancy, while surgical treatment is planned after childbirth. Additionally, the following are used:

urogynecological physiotherapy and deep muscle therapy,
techniques supporting tissue regeneration (e.g., procedures improving microcirculation and the tension of the skin and fascia),
preventative actions to prevent the progression of changes.

The modern therapeutic approach assumes the individualization of treatment and close cooperation between the gynecologist, surgeon, and physiotherapist, allowing for the reduction of the risk of complications and the optimization of the abdominal wall regeneration process after the completion of pregnancy.

Pregnancy hernia – diagnostics and differentiation

Diagnosis of pregnancy hernia is primarily based on clinical examination and – in case of doubt – on imaging studies. Palpation of the abdominal wall is of key importance, during which the doctor identifies a characteristic bulge, its size, location, and the possibility of reducing the hernia contents into the abdominal cavity. In the physiological conditions of pregnancy, this examination requires particular precision due to changed anatomy and wall tension.

Additionally, ultrasonography (USG) is used, which enables:

assessment of the size of the hernia orifice,
identification of its contents (adipose tissue, intestinal loops),
differentiation from other lesions within the abdominal wall.

Differential diagnosis is of significant clinical importance and primarily includes:

diastasis recti (diastasis of the rectus abdominis muscles) – widening of the linea alba without the presence of an actual fascial defect; absence of a typical hernia sac,
linea alba hernia – located in the midline above the umbilicus,
lipomas and other benign soft tissue lesions – usually unchanging during an attempt to increase intra-abdominal pressure,
post-traumatic or postoperative lesions – especially in the case of previous surgical incisions.

Differentiation is of practical importance because diastasis recti, although it often coexists with a hernia, requires a different therapeutic approach, based mainly on physiotherapy rather than surgical treatment. Precise diagnosis allows for proper planning of further management and reducing the risk of complications.

Pregnancy hernia vs. delivery and the postpartum period

The presence of a pregnancy hernia in most cases does not constitute an absolute contraindication to vaginal delivery. The decision regarding the mode of delivery should be made individually, taking into account the size of the hernia, its symptoms, and the patient's general condition. Small, asymptomatic umbilical hernias usually do not significantly affect the course of delivery, while larger changes or the presence of pain may require expanded diagnostics and surgical consultation.

During natural birth, there is a significant increase in intra-abdominal pressure, which may temporarily exacerbate hernia symptoms. Nevertheless, in most patients, no significant complications directly related to childbirth are observed. Indications for a cesarean section are relative and primarily include:

large hernias with a risk of incarceration,
painful, irreducible bulges,
coexisting surgical complications.

The postpartum period is a key stage in assessing further management. After delivery, with the decrease in intra-abdominal pressure and gradual tissue regeneration, some hernias may decrease in size; however, complete spontaneous closure rarely occurs.

Postpartum management includes:

clinical observation in the first months of the postpartum period,
urogynecological physiotherapy aimed at restoring the function of deep muscles (transversus abdominis muscle, pelvic floor muscles),
learning correct breathing patterns and intra-abdominal pressure control.

Surgical treatment (hernioplasty) is usually considered after the completion of the postpartum period and the stabilization of body weight and hormonal balance. Modern surgical techniques include:

classical methods (suturing of own tissues),
techniques using synthetic materials (surgical meshes), which increase the durability of the effect.

The optimal timing of surgical intervention is determined individually, often after the end of breastfeeding and full tissue regeneration. A comprehensive approach, involving cooperation between a gynecologist, surgeon, and physiotherapist, allows for effective treatment and minimization of the risk of recurrence.