Don't try to pull any tentacles off your skin immediately, but first flush the area with sea water to try and get rid of them. Don't use vinegar, as it can make blue bottle stings worse. Applying cold water or ice to the area and taking an antihistamine as soon as you can, will help your symptoms. If there are any signs of an allergic reaction, don't delay – get help immediately by calling 111. Whatever the culprit, if you or anyone around you seems to be having a serious reaction to a bite or sting – don't delay.

Source: Stuff December 30, 2019 15:56 UTC