Sea Urchin Stings
(See also Introduction to Bites and Stings.)
Sea urchins are covered with long, sharp, sometimes venom-coated spines. Touching or stepping on these spines typically causes a painful puncture wound. The spines commonly break off in the skin and cause chronic pain and inflammation if not removed. Joint and muscle pain and rashes may develop.
Sea urchin spines should be removed immediately. Because vinegar dissolves most sea urchin spines, several vinegar soaks or compresses may be all that is needed to remove spines that have not penetrated deeply. Surgical removal may be required for imbedded spines. Soaking the injured body part in hot water often relieves the pain.