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.
Flu symptoms are often numerous and may resemble the symptoms of a common cold. In most cases the flu symptoms are more intense than those of a common cold. According to the CDC, flu symptoms may include some or all of the following: 1  Headache. 2  High Fever. 3  Tiredness/weakness which can be extreme. 4  Runny Nose. 5  Body and/or Muscle Aches. 6  Dry Cough. 7  Sore Throat. 8  Diarrhea and Vomiting (usually more common in children)