Hot flashes and nausea are most commonly caused by hormonal imbalances in the body, most notably, by sex hormones. For women, a decrease in estrogen is often to blame, whereas in men, testosterone deficiency can create the problem. Sometimes, the symptoms occur for reasons not related to those hormones at all.
Flu Symptoms. Symptoms of the flu generally begin more suddenly than those of a cold and they are more severe. Flu symptoms include a fever, sore throat, congestion, cough, muscle aches, general soreness, moderate to severe fatigue and headache.
The flu is different from a cold. The flu usually comes on suddenly. People who have the flu often feel some or all of these symptoms: Fever* or feeling feverish/chills. Cough. Sore throat. Runny or stuffy nose. Muscle or body aches. Headaches.