Much as it pains me (no pun intended) to admit it, I came back from a six month trek around india, Pakistan, Iran, etc. with quite a severe dose of sciatica, due to carrying up to 16k in a bag on one shoulder.
It's all but gone, and now when I travel I take my bag on a trolley.
But in a couple of months I'm off to Egypt and the Sudan - very poor infrastructure and a whole lot of desert. I'm thinking seriously that I'll need a rucksack, and am worried about whether or not this is likely to put my back out again (I still fell a twinge or two if I carry heavy shopping).
Does anyone on here have advice for me?

