A decreased level of consciousness occurs in 0.5–6% of severe cases, which is attributable either to inflammation of the brain by the virus or indirectly as a result of impairment of vital organs, for example, the liver.
=== Pridružene težave ===Denga lahko občasno vpliva na nekatere druge sisteme v telesu, bodisi samostojno ali skupaj s klasičnimi simptomi mrzlice denge.