I don't know if this would apply since the numbness is on the back of your leg but I had burning sensation in my leg after covid and my neuro asked if I'd been coughing a lot - apparently there's a nerve in your abdomen area that can be compressed with a lot of coughing and cause sensory changes in your leg! who knew. also any virus/illness can cause little flare ups but it doesn't necessarily mean it's a relapse.

Thanks for the reply Evie. That’s interesting. Maybe something to do with the coughing! I’ll give it another while before I start to worry worry about it. I think my main worry was it was new and on my “good” leg. Still learning what’s what 😂