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.
If you have a cold, youâll probably experience symptoms such as: 1  runny or stuffy nose. 2  sore throat. 3  sneezing. 4  mild-to-moderate fever. 5  cough. 6  headache or body aches. 7  mild tiredness.
It's not the same as the common cold. Flu is caused by a different group of viruses and the symptoms tend to start more suddenly, be more severe and last longer. Some of the main symptoms of flu include: 1  a high temperature (fever) of 38C (100.4F) or above. 2  tiredness and weakness. 3  a headache.