Severe SPASM is a medical condition that is characterized by sudden, involuntary muscle contractions. It is also known as a 'THROE' or 'troe, ' both of which are terms used to describe the intense PAIN associated with the condition. The term 'THROE' is derived from the Greek word for 'PAIN, ' and 'troe' is derived from the Old English word for 'SPASM.' Both terms are used to describe the same condition, but 'THROE' is more commonly used in medical terminology.