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.
How to Tell the Difference Between a Cold and the Flu. The cold and flu are both respiratory illnesses, but they are caused by different types of viruses. Flu symptoms. usually come on quickly (within 3-6 hours) and consist of a fever, body aches, dry cough, and extreme. tiredness. Cold symptoms are less severe and people experience a stuffy nose, productive cough, slight.