Respuesta :

The veins around your anus tend to stretch under pressure and may bulge or swell. Swollen veins (hemorrhoids) can develop from increased pressure in the lower rectum due to: Straining during bowel movements. Sitting for long periods of time on the toilet.

Answer:

The most common cause of external hemorrhoids is repeated straining while having a bowel movement. Hemorrhoids develop when the veins of the rectum or anus become dilated or enlarged and can be either internal or external.

Explanation:

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Hope this helps!!!

Kyle.