Don't forget that the severity of the pain is usually not an indication of how serious the problem is. Most patients in extremely acute pain have got simple muscle spasms which, although incredibly painful, are usually resolved quickly.
The worst part of an acute condition is that the inflammation makes the joint swell. Think of it as a sprained ankle and put a packet of frozen peas wrapped in a thin tea-towel on the painful area. Apply for 10 minutes evey hour - even if initially it feels sore, it will help.
NB: Do not use if suffering from diabetes or very poor circulation.
Or as mobile as you can. If you can get out of bed at all, do so at regular intervals and gently move around the room.
If what you are doing hurts - STOP. Don't try to push through the pain.
There isn't any right or wrong position, just do whatever feels best if you have low back pain. Most patients find lying on their back with their knees bent (stick a rolled up duvet under your knees) is fairly comfortable.
Unless it's your most comfortable position. Lying with your legs straight on a very hard surface generally increases the load at the bottom of your back.
The heat may aggravate any inflammation present and the position can make you seize up.
Do take whatever you need to get relief (ask your doctor for advice/prescription), but remember that the tablets doesn't actually cure or heal your problem - they just mask the pain. Therefore you should still be very careful even when you start to feel better.
From your family and friends. Don't be proud, you can always pay them back later!
If the pain persists past 48 hours you will need a thorough examination to diagnose the exact nature of the problem. We can then help you to help yourself so that you get back to normal activities as soon as possible. Early manipulation is suggested in the NICE guidelines for the management of non-specific lower back pain. http://www.nice.org.uk/CG88