DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Prolapsing haemorroids (piles) in pregnancy. Piles are swollen veins in the lining of the anus. They can be caused by straining to pass hard faeces and, as in this case, by pregnancy. Pregnancy puts increased pressure on the anus from an enlarged uterus. When piles protude outside the anus they are deemed to be prolapsing. Symptoms are rectal bleeding and pain on defecation. With prolapsed haemorrhoids there is the additional risk of thrombosis and strangulation (decreased blood flow in a vein due to clotting).
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