Is anal fistula hereditary?

Anal fistula is not directly hereditary. Its occurrence is primarily associated with acquired factors such as perianal infections, anal trauma, and anorectal diseases. There is no clear genetic transmission pattern, and the presence of multiple cases within a family is mostly due to shared lifestyle habits. If symptoms such as redness, swelling, pain, or pus discharge around the anus occur, prompt medical attention is recommended.

The primary cause of anal fistula is an abnormal tract formed after the rupture of a perianal abscess, usually triggered by bacterial infection. For example, if an anal gland infection is not promptly controlled, it may gradually develop into an abscess, leaving behind a fistula after rupture. These infectious factors are all acquired and not directly related to genetic inheritance.

In some families, multiple members may develop anal fistulas, mainly due to shared living habits—such as prolonged sitting, consuming spicy and greasy foods, and irregular bowel movements. These habits increase the risk of perianal infection rather than being caused by genetic inheritance. Individuals with congenital abnormalities in anal development may have a higher risk of developing anal fistula, but this is considered a developmental issue rather than a genetic disease.

To reduce the risk of perianal infection, maintain good anal hygiene by washing with warm water after bowel movements; eat a balanced diet rich in fruits and vegetables, and avoid long-term consumption of spicy or irritating foods; establish regular bowel habits to prevent constipation or diarrhea; avoid prolonged sitting or standing, and engage in moderate physical activity regularly.