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.
Cold symptoms typically begin with a sore throat that may be mild or severe. After a day or two, the sore throat improves and nasal symptoms, such as congestion or a runny nose, appear. Nasal secretions begin as a thin and watery discharge, then develop into a thicker and darker discharge several days into the illness.
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.