Sharpness or coldness. The feeling of coldness or chillness means shudder of a slight cold. It can occur as the reason for fever or just because of the cold air around you. Still, speaking about malaria, this illness can be a factor of mitigating. Any kind of body chilling condition because of the infections or even cancer may provoke fever and shaking or feeling cold. Such shaking is also a widespread symptom of influenza. Looking at the chills from a different angle, it means spontaneous muscles squeeze and relaxation.