His chronicle of his trip, The naturalist on the River Amazons, became a bestseller when it was published in 1863.
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.
Is Nausea a Symptom of Hot Flashes? Yes, nausea is a symptom of hot flashes, although it isn't a primary symptom, so it may not be experienced by all women. The main symptoms of hot flashes include intense feelings of heat, rapid heartbeat, flushing of the face and neck, perspiration, and cold chills, which usually follow the hot flash.