The umbilical cord stump usually dries, shrivels, and falls off within one to three weeks of birth. For most babies this process is uneventful. A small proportion — around one in five hundred — develop a granuloma: a small, pale pink or red, glistening lump of tissue in the belly button once the stump has separated. It looks a little alarming but is usually painless and straightforward to treat.
The main practical concern for parents is distinguishing a granuloma from an infection. Infection of the umbilical area (omphalitis) in a newborn is a different situation entirely — it spreads quickly, it requires urgent treatment, and it can become life-threatening. Knowing which is which matters.
Healthbooq (healthbooq.com) covers newborn health and common conditions of early infancy.
What a Granuloma Is
When the cord stump separates, it leaves a raw wound at the navel. In most babies, this heals quickly and cleanly by epithelialisation. In some, excess granulation tissue forms — a normal part of wound healing that has simply become exuberant. This tissue is moist, soft, and pink or red in colour. It may have a slight mucoid discharge. It is typically pea-sized or smaller, though occasional granulomas grow larger.
Granulomas are not painful and do not cause distress to the baby. They do not become infected in themselves (though the surrounding area can), and they do not indicate any underlying problem with healing or immunity.
Distinguishing a Granuloma from Infection
Omphalitis is infection of the umbilical stump or navel. It presents with redness and warmth spreading into the skin around the umbilicus, a foul-smelling discharge (often purulent or yellow-green), oedema (swelling) of the surrounding tissue, and in more serious cases, a baby who appears unwell — irritable, feeding poorly, lethargic, or febrile.
The key feature is the spreading redness (periumbilical cellulitis). This distinguishes omphalitis from a simple granuloma, which has a moist pink lump but no surrounding skin involvement. Omphalitis in a newborn requires same-day medical assessment and IV antibiotics in many cases because of the risk of spreading to the peritoneum, the liver, or becoming septic in a baby with a still-developing immune system.
A granuloma has no surrounding redness, no spreading cellulitis, no purulent discharge, and a baby who is entirely well.
Other Differentials
A patent urachus occurs when the channel between the bladder and the umbilicus (the urachus) fails to close, leading to leakage of urine from the navel. If the umbilical discharge is clear, watery, and recurrent, this should be assessed.
A patent omphalomesenteric duct (a remnant connection from the midgut) can similarly cause persistent discharge from the navel and requires specialist review.
Both of these are rare and usually identified by the character of the discharge or persistence despite treatment of a presumed granuloma.
Treatment
The most common treatment for umbilical granuloma is silver nitrate cauterisation, applied by a GP or practice nurse. Silver nitrate is a caustic chemical that destroys the excess tissue. A small amount is applied to the granuloma with a silver nitrate stick, avoiding the surrounding normal skin (which is often protected with petroleum jelly). One to three applications, spaced a week apart, resolves most granulomas. The treated area turns black temporarily and then dries and separates.
Surgical string ligation is an alternative: a fine piece of suture or umbilical thread is tied around the base of the granuloma, cutting off its blood supply. The tissue then dries and falls off within a week or two. This is effective for pedunculated (stalk-based) granulomas.
Salt treatment has gained popularity as a home remedy: a small amount of table salt is applied to the granuloma, left briefly, then gently wiped off. Some small case series and reports suggest this is effective, and a study by Unal et al. (2018) in Turkey reported good outcomes, but evidence remains limited compared to silver nitrate. If attempting this at home, use it only after a GP has confirmed the diagnosis.
Routine Cord Care
Standard NHS guidance is to keep the cord stump clean and dry, fold the nappy below the stump to keep it dry and exposed to air, and avoid immersing the baby in water until the stump has fully separated and the navel has healed. There is no evidence that alcohol wipes speed up cord separation and they are not recommended by current UK guidance.
Key Takeaways
An umbilical granuloma is a small, moist, pink or red lump of granulation tissue that forms in the belly button after the umbilical cord stump falls off. It is the most common abnormality of the umbilical cord stump. Most granulomas are benign and respond to simple treatment, most commonly silver nitrate application or surgical string ligation. An umbilical granuloma should be distinguished from omphalitis (infection of the umbilical stump), which is a potentially serious condition requiring urgent antibiotic treatment, and from a patent urachus or omphalomesenteric duct remnant, which require specialist review.
