An umbilical hernia is almost always diagnosed with a simple physical exam. In most cases, no blood tests, scans, or special procedures are needed. A doctor can identify the hernia by looking at and feeling the area around your belly button, often in just a few minutes. Imaging only comes into play when complications are suspected or the diagnosis is unclear.
What Happens During the Physical Exam
The first thing a doctor does is look for a visible bulge near the belly button. Umbilical hernias create a soft swelling right at or next to the navel, caused by tissue or part of the intestine pushing through a weak spot in the abdominal wall. In many cases, this bulge is obvious just from looking.
If the hernia isn’t immediately visible, your doctor will ask you to cough, bear down, or strain your abdominal muscles. These actions increase pressure inside your abdomen and push the hernia outward, making it easier to see and feel. The doctor places their fingers over the belly button area and feels for a distinct impulse or bulge when you cough. This is often the single most useful step in confirming the diagnosis.
Your doctor will also gently press on the bulge to see if it can be pushed back into the abdomen. A hernia that slides back in easily is called “reducible,” and that’s a reassuring sign. One that stays stuck in place, called “incarcerated,” needs closer attention. The size of the fascial defect (the gap in the abdominal wall) is estimated by feel, which helps guide decisions about whether surgery is needed or monitoring is appropriate.
How It’s Checked in Babies and Children
Umbilical hernias are extremely common in newborns, especially premature infants. A pediatrician typically spots one during a routine well-baby visit. The bulge near the belly button becomes more noticeable when the baby cries, strains, or coughs, which naturally increases abdominal pressure.
Examining young children requires a slightly different approach than adults. If the hernia isn’t obvious while a child is lying down, the doctor may examine them in an upright position while gently pressing on the abdomen. For infants and toddlers, simply tickling the child can prompt enough straining to make the hernia visible. The exam is quick and painless.
Most umbilical hernias in children close on their own by age 4 or 5, so the initial diagnosis often leads to a watch-and-wait plan rather than immediate treatment. The doctor will note the size of the defect and track it at follow-up visits to confirm it’s shrinking over time.
When Imaging Is Needed
For a straightforward umbilical hernia, imaging adds nothing to what a physical exam already reveals. A surgeon’s diagnosis and treatment decisions are reliably made from the patient history and physical exam alone, and routine ultrasound for a clinically obvious hernia is generally unnecessary.
That said, there are specific situations where your doctor may order an abdominal ultrasound or CT scan:
- Suspected complications. If the hernia appears incarcerated (stuck) or there are signs that blood supply to the trapped tissue may be compromised, imaging helps confirm the severity.
- Unclear diagnosis. Some conditions look similar to an umbilical hernia on the surface. Imaging can distinguish between a true hernia and other causes of abdominal bulging.
- Surgical planning. For larger or more complex hernias, a CT scan gives the surgeon a detailed map of the abdominal wall, including the exact size of the defect and the contents of the hernia sac.
Ultrasound is the go-to first choice because it’s fast, painless, and doesn’t involve radiation. CT scans provide more detail and are reserved for cases where the ultrasound is inconclusive or surgery is being planned.
Conditions That Can Look Like an Umbilical Hernia
Not every bulge near the belly button is a hernia. One of the most common look-alikes is diastasis recti, a separation of the abdominal muscles along the midline. Both conditions cause visible bulging in the abdominal area, and many people actually have both at the same time.
The key difference is what’s happening underneath. A hernia involves tissue pushing through an actual hole in the abdominal wall. Diastasis recti is a stretching and thinning of the connective tissue between the two sides of the abdominal muscles, with no true gap for tissue to herniate through. To tell them apart, a doctor will have you lie on your back and do a small crunch while they feel along your midline. With diastasis recti, they’ll feel a wide, soft separation between the muscle edges rather than a distinct defect with a bulge pushing through it. When the distinction is still unclear, a CT scan can accurately measure the separation and identify whether a hernia is also present.
Other conditions occasionally confused with umbilical hernias include lipomas (benign fatty lumps under the skin), fluid collections, or enlarged lymph nodes. These are usually easy to rule out during a physical exam because they feel different, don’t change size with coughing, and don’t reduce back into the abdomen with gentle pressure.
Can You Diagnose It Yourself?
Many people notice an umbilical hernia on their own before ever seeing a doctor. The telltale sign is a soft bulge at or near the belly button that becomes more prominent when you cough, lift something heavy, or strain during a bowel movement. You may notice it disappears or flattens when you lie down. That pattern of appearing with pressure and disappearing at rest is highly characteristic of a hernia.
While self-detection is common and often accurate, a medical evaluation is still important. A doctor can confirm the diagnosis, estimate the size of the defect, check whether the hernia is reducible, and rule out the conditions that mimic hernias. This information determines whether you need surgery, can safely monitor it, or are dealing with something else entirely.
Red Flags That Need Immediate Attention
Most umbilical hernias are painless and develop slowly. But a hernia becomes dangerous when the tissue pushing through gets trapped and its blood supply is cut off. This is called strangulation, and it’s a medical emergency.
The warning signs include sudden, severe pain at the hernia site that keeps getting worse and doesn’t let up. You may also experience nausea and vomiting, which can signal that a loop of bowel is trapped. One of the most telling visual signs is a change in the skin color over the bulge. The skin may first become paler than usual, then turn reddish or noticeably darker. A hernia that was previously easy to push back in but now feels firm and won’t budge is another urgent sign. If you experience any combination of these symptoms, call emergency services. Strangulated hernias require emergency surgery to restore blood flow to the trapped tissue before permanent damage occurs.