Why do northerners come to the south? Why is the whole body arthralgia in summer?

It may be acute rheumatoid arthritis caused by humid weather in the south. It's not a big problem to strengthen exercise and strengthen physical fitness. It is necessary to be cold-proof, rain-proof and moisture-proof, and pay attention to the warmth of joints. Don't wear wet clothes and shoes and socks. Summer is hot, don't be greedy for cold dew, drink cold drinks, etc. The climate in autumn is dry, but the autumn wind is cool and the weather turns cold, so we should prevent it from catching cold. It's freezing in winter, so keeping warm is the most important thing.