The first thing to do is to keep calm. If you overreact, it will attract others' attention and make you embarrassed. If you find that you have lost your clothes, you should pick them up immediately and cover the key parts to avoid running away. If the clothes are just tied up, then they can be tied up immediately at this time, thus solving the crisis without showing emotions.
If the clothes are far away from you and it is not convenient to get out of the water, then you can soak the clothes in the water first and don't come out. Then carefully remind friends around you, tell them your predicament, and then ask friends to help you get a dress or bring your lost swimsuit. It should be noted that in this process, the smaller the action, the better.
There are always many unexpected situations when swimming, so when choosing a swimsuit, you should think carefully and put practicality and safety first.