What Causes a Liver Hemangioma? Is It Present at Birth?

A liver hemangioma (sometimes called a hepatic hemangioma) is a benign (non-cancerous) tangle of blood vessels in the liver ^[1]. While it is common to worry that a specific action or lifestyle choice caused this condition, the exact cause of a liver hemangioma remains unknown ^[2]. The leading medical theory is that they are developmental vascular malformations—meaning they stem from abnormal blood vessel development early in life ^[3]. They are not known to be caused by lifestyle choices, such as your diet, alcohol consumption, exercise habits, or physical injuries ^[4]. Furthermore, because they are not an infection, they are completely non-contagious ^[1].

Most typical liver hemangiomas are harmless, cause no symptoms, and do not require treatment ^[1]. The key next step is simply confirming with your doctor that the imaging appearance is typical and discussing whether any follow-up is needed ^[2].

Are You Born With It?

Pediatric specialists recognize specific subtypes of hemangiomas that are clearly congenital (meaning they are present at birth) or infantile, which can be seen on ultrasounds in newborns ^[5][6].

However, the typical adult hepatic hemangioma is usually not discovered until later in life ^[2]. This usually happens incidentally—meaning you undergo an imaging scan for an unrelated reason, such as a minor injury or unrelated abdominal pain, and the doctor spots the hemangioma ^[7].

Because they often go undetected for decades, it can feel like a new problem when a doctor first finds it ^[2]. While researchers suspect these adult lesions may also originate from early developmental changes, the exact timing of when an individual’s hemangioma formed cannot always be proven ^[2].

Can Diet, Alcohol, or Injury Cause a Hemangioma?

When diagnosed with a liver condition, people frequently ask if they could have prevented it. Liver hemangiomas are fundamentally different from other common liver diseases, like fatty liver disease or cirrhosis, though these conditions can sometimes exist at the same time ^[4].

• Diet and Alcohol: There is no credible evidence that eating certain foods, being overweight, or drinking alcohol causes a hemangioma to form ^[8]. However, maintaining a healthy diet and managing alcohol intake remain important for your overall liver health.
• Physical Injury: A physical injury to the abdomen does not cause a hemangioma to form ^[1]. People often discover a hemangioma after an accident because the injury led to the scan, not because the injury caused the lesion.
• Hormones: While hormones are not believed to cause a hemangioma to form, some research suggests that exposure to estrogen (a hormone naturally found in the body and in some medications) might influence the growth of a hemangioma that is already there ^[9]. This evidence is still limited and uncertain ^[2]. Medical guidelines do not automatically require stopping oral contraceptives or hormone replacement therapy ^[9]. You should discuss your specific situation with your clinician before making any changes to prescribed hormone medications.

Rare Complications and When to Seek Care

Most typical hemangiomas cause no symptoms and will never pose a risk to your health ^[1]. However, in very rare cases, a severe physical injury could theoretically cause a very large, pre-existing hemangioma to bleed ^[9].

If you experience sudden, severe abdominal pain (especially in the upper right side), fainting, extreme dizziness, weakness, pallor, or a rapid heartbeat after an injury or out of nowhere, you should seek urgent emergency medical care ^[2][10].

Activity and contact-sport restrictions are highly individualized ^[9]. Do not assume you need to limit your physical activity unless your doctor advises it based on the specific size, location, and symptoms of your hemangioma.