hot leg

hi, a while back i had a 3 week weired sensation in my left leg. the leg itself felt normal, but if i leant against or sat on something i knew should be cold, it felt warm to that leg only (as though someone had just got up from the leather chair/toilet seat). would this be classed as a relapse? never had anything like it before and no other symptoms at the time.

many thanks take care

sue x