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 can be similar to those of a cold, although they tend to be more severe. Symptoms can include: 1  dry, hacking cough. 2  moderate-to-high fever (although not everyone with the flu will run a fever). 3  sore throat. 4  shaking chills. 5  severe muscle or body aches. 6  headache. 7  stuffy and runny nose.
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.