It is impossible to have a fever by soaking your feet. Moreover, if you really have a fever, there are risks. Don't be too ill. Diarrhea is ok. You can go to the drugstore to buy Niuhuang Jiedu tablets, take three tablets at a time, twice a day, and have diarrhea the next day. No more, you can't shake without taking a shower. If you don't have diarrhea, you will catch a cold, but it may be very serious.