Constitutional symptom Shivering 2016-11-29T11:13:35Z true true https://pdfs.semanticscholar.org/286d/427de14ed86a44160267f6a2c444afccf2a1.pdf Shivering is a physiologic method of heat production in man and other mammals. Shivering is a bodily function in response to fever, early hypothermia or feeling cold. Shuddering https://www.ncbi.nlm.nih.gov/books/NBK1169/#adnfle.Clinical_Characteristics HPO:probinson Shivering Involuntary contraction or twitching of the muscles.