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.
Of the 13 causes of Feeling cold that we have listed, we have the following prevalence/incidence information: 1  1 causes are very common diseases. 2  1 causes are common diseases. 3  0 causes are uncommon diseases. 4  0 causes are rare diseases. 5  0 causes are very rare diseases.  13 causes have no prevalence information.