DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Prolapsing haemorrhoids (piles) of a 74-year-old woman. Piles are common, particularly during pregnancy due to extra pressure on the veins in the anus. Some people have a congenital weakness of these veins. Mild cases are controlled by drinking plenty of fluids and a high-fibre diet. Severe cases are treated by surgery.
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