The pain disappears after a couple of hours.
Bathers should contact the emergency services or the lifeguards at their beach as soon as possible if they spot one, as care should be taken whether one is found in the sea or dead on the shore.
This is because its venom can still cause harm.
National Geographic said about the Portuguese Man O’ War jellyfish: “These long, thin tendrils can extend 165 feet in length below the surface, although 30 feet is more the average. They are covered in venom-filled nematocysts used to paralyze and kill fish and other small creatures. For humans, a man-of-war sting is excruciatingly painful, but rarely deadly.”