In several dengue fever cases, patients suffer from nausea and vomiting as well. This is because if the virus is potent and the sufferer's immunity is poor, the infection spreads more rapidly and affects the gastric tract. Nausea and vomiting shouldn't last for more than a couple of days and should not occur too frequently. If it does, the suffering individual has severe dengue, which is a life-threatening condition. Even with non-severe dengue, low-intensity nausea or vomiting tends to affect the body adversely. Dehydration is also a serious concern when it comes to profuse vomiting.

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