If they are new symptoms that you've not had before, then you need to tell your MS nurse as it may be a relapse. Typically a relapse, as I understand it, is a new symptom in a new part of the body, normally gets worse for a few days is bad for a week or so then subsides. Should be fairly constant during that period. If you have had the numbness in your legs before then it's not something to be worried about and is just old symptoms flaring up, common causes of old symptoms flaring are being overtired, stress, getting ill, heat or very cold weather, there can be other causes, basically anything that causes inflammation in your brain. Hope that helps and normal feeling comes back soon.