Thanks for writing to us.
The sudden pain restricted to only one leg along with the skin eruptions could be related to herpes
. A direct examination of the area is an integral part of the diagnosis. Do consult your physician for the same.
I hope this information has been both informative and helpful for you. You can consult me again directly through my profile URL http://bit.ly/Dr-Praveen-Tayal
Dr. Praveen Tayal