Reduce fever after reporting it Prevent infections 2. Check the temperature twice over a 2-hour period to be sure that there is a fever. You may want to buy a new thermometer if you have one that you do not trust or cannot read. Ask your pharmacist or a store clerk to help you select one. Severe shaking chills that last 20 minutes or that come and go over a 1-hour period.
Chills occur before a temperature goes up.
Take the temperature after the chills and shaking have stopped unless they continue for more than 1 hour. Take a temperature during the chills if they last for more than 1 hour. Frequent, painful urination. Painful urination indicates a urinary tract infection. Usually the person with this type of infection urinates in very small amounts.