Itching versus pain: Paresthesias refer to abnormal sensation "numbness and tingling" which can be annoying. Dysesthesias are a more intense version of the same sensation which you would call painful. The sensations run on the same nerve endings, again one is just more intense than the other.
Answered 5/8/2018
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Good question: Paresthesia means altered sensation, not necessarily disagreeable. Dysesthesia means altered sensation which are disagreeable (especially painful). All dysesthesias are paresthesias (but not the other way around).
Answered 5/8/2018
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