I am in Dadonghai, Sanya. I just swam at the seaside. I don't know what bit me, but now my leg is red and swollen. What's the problem?

It was stung by a jellyfish. I was stung while swimming in Dadonghai the day before yesterday. I was scared by two strokes on my hand and one stroke on my stomach. I hurried ashore and asked the lifeguard, red and swollen, stinging and fidgety. The lifeguard said it was a jellyfish sting and told me to use some white vinegar ~ it's not poisonous. Because I was out for fun, I applied Mentholatum cream to reduce the swelling later that day. It stopped hurting for two days, but there were some small marks. If you don't feel at ease, you can go to the drugstore and let the people there show you. They usually know at a glance.