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.
Cold vs. Flu. If you experience a faster onset of symptoms, you may have the flu instead of a cold. For example, you may feel significantly worse within three to four hours if you have the flu. Flu-like symptoms may include a painful sore throat, a deep cough, extreme fatigue, and a sudden fever.Usually these can be treated at home.old vs. Flu. If you experience a faster onset of symptoms, you may have the flu instead of a cold. For example, you may feel significantly worse within three to four hours if you have the flu. Flu-like symptoms may include a painful sore throat, a deep cough, extreme fatigue, and a sudden fever.