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.
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)