25 YO male here
For past 2 and half weeks ive been having pain in my upper bum/lower back right side in same spots it a stabbing pain happens if I walk sit stand lye ect,
Its now almost gone but I now have the same pain in the same area on the left bum cheek and it is agony
How can this be, how can it of moved from one side to another
Anyone have any ideas would be truly thankful as im worrying
Try not to worry too much - I know that's difficult when you get unexpected pain.Does the pain radiate down your leg at all? It may be a pinched nerve in your lower back. Best thing to do is speak to your GP. Our bodies are mysterious machines. Hope this helps.
Sciatic pain.Chiropractor can help if it is.
Maybe you need an MRI. Did you have a fall or lift anything unusually heavy lately? Good luck.
Sorry to hear your situation it seems like my situation 30 years ago and my sons current situation. Pain changing sides is common as are changes in pain intensity. My first stop would be a good physio and learn to look after your back. When the pains bad prescription pain killers can help (get advice from your gp) also try TENS machines are cheap and work for me, my wife and my son. When the pain reduces look at doing back exercise and when feeling good make sure you get good core strength (planks pilates is good). With care you will be fine.
Keep your spirits up.
Barry
Crps I need some advice and help please 
Im 16 and ive had severe back pain since i was 14
I have a random one for you all.
musculo skeletal pain
Lower back, leg , hip and groin pain
