I have mild spina bifida, so can put my back out a little too easily. If you don't have a bath the a hot shower aimed at the worst part often helps, ideally gently flexing (bending your back at the same time) can give a bit of releaf for a while. After that deep heat and pain killers together ...
... with immaculate posture. Ibru.. (cannot spell the stuff) is ok but often needs double dosage - 4 tablets instead of 2. Lying down can appear to help but relaxes the muscles around the spine too much and is only temporary, so best to stay upright -hence the posture. If it is lower back ...
Which mine always is, then stretching can help. By that I mean suspending yourself on your arms and relaxing your back so you are almost hanging from your shoulders can help realise your back. (But be careful with this.)
Is always my upper back, between my shoulders, absolute nightmare.
Ah bugger, forget the bit about stretching then and the deep heat might be a bit tricky as well, though does give you an excuse to get someone else (partner?) to do it for you. BTW I didn't say it before but you have my sympathy.
Hope it calms down quickly.
Thank you very much for your advice!