Open water swimmers warned about fluid in the lungs

Some of the Cuskinny Open Water Swimmers (COWS) swimming at Cuskinny, Co. Cork.

Open water swimmers are being warned about a potentially dangerous condition that causes fluid in the lungs.

Medics writing in the journal BMJ Case Reports said swimmers should be told more about the risks of swimming-induced pulmonary oedema (SIPE), which has been linked to cold water swimming.