It is also known as laryngeal dystonia. The term spasmodic describes sudden and intermittent jerking movements of muscles and, as such, SD is characterised by poor vocal motor control during speech due to intermittent and involuntary spasms of the laryngeal muscles.
Low iron levels are one of the most common reasons for chronic coldness. Here's why: Iron is a key mineral that helps your red blood cells carry oxygen throughout your body, bringing heat and other nutrients to every cell in your system, explains Dr. Phillips.
Cold water can cause a sudden drop in body temperature. Photo Credit: shanesabin/iStock/Getty Images Like any other medical symptom, a sudden drop in body temperature can have many causes, some of which are quite normal. For example, people typically experience a rapid drop in body temperature before sleep, and women experience a drop in temperature each month before menstruation begins. And everyone is familiar with the sudden drop in temperature after an illness, when a fever is said to break.