On Friday I lifted something that was way too heavy for me and I carried it across the garden. Stupid! It strained my back and I've been in agony since. Well, not too bad when I'm standing but I have a really painful lower back when I'm sitting, lying down or get up from sitting.
Painkillers don't seem to touch it, but I will take some now to help me sleep. I should have used an ice pack a couple of days ago of course, but I'll try that now too. I walked today and gently mowed the lawn which helped, until I came inside and wanted to relax on the sofa and now I'm stuck on here plucking up the courage to move!
As has been said, heat helps some whilst cold helps others. Try a hot water bottle, if that doesn’t work then do what I’ve done in the past and filled one with freezing water!