An abnormal skin sensation similar to that of insects crawling over or within the skin; a tactile hallucination involving such a sensation. A common side-effect of substance abuse, it can also be experienced with high fever, menopause, skin cancer, diabetic neuropathy, or herpes zoster.
A violent, excruciating seizure of pain.
A sudden, involuntary contraction of a muscle, a group of muscles, or a hollow organ.
A sudden and temporary burst of energy, activity, or emotion.
To produce and undergo a spasm or series of spasms.