The hyperventilation due to hiccups can lead to hypocapnia i.e. reduced level of CO2 in blood leading to cerebral vasoconstriction, leading to cerebral hypoxia and this can cause transient dizziness (''upahatasmruteh''), visual disturbances, and anxiety. | The hyperventilation due to hiccups can lead to hypocapnia i.e. reduced level of CO2 in blood leading to cerebral vasoconstriction, leading to cerebral hypoxia and this can cause transient dizziness (''upahatasmruteh''), visual disturbances, and anxiety. |