From: https://www.nhs.uk/conditions/back-pain/
Back pain, particularly lower back pain, is very common. It usually improves within a few weeks but can sometimes last longer or keep coming back.
Back pain can have many causes. It's not always obvious what causes it, and it often gets better on its own.
A common cause of back pain is an injury like a pulled muscle (strain).
Sometimes, medical conditions like a herniated disc sciatica or ankylosing spondylitis can cause back pain.
Very rarely, back pain can be a sign of a serious problem such as a broken bone, cancer or an infection
See a GP if:
back pain does not improve after treating it at home for a few weeks
the pain is stopping you doing your day-to-day activities
the pain is severe or getting worse over time
you're worried about the pain or you're struggling to cope
Severe pain:
always there and so bad it's hard to think or talk
you cannot sleep
it's very hard to move, get out of bed, go to the bathroom, wash or dress
Moderate pain:
always there
makes it hard to concentrate or sleep
you can manage to get up, wash or dress
Mild pain:
comes and goes
is annoying but does not stop you doing daily activities
Ask for an urgent GP appointment
You have back pain and:
a high temperature
you've lost weight without trying to
there's a lump or swelling in your back or your back has changed shape
the pain does not improve after resting or is worse at night
the pain is made worse when sneezing, coughing or pooing
the pain is coming from the top of your back (between your shoulders), rather than your lower back
Go to Emergency if:
You have back pain and:
pain, tingling, weakness or numbness in both legs
numbness or tingling around your genitals or buttocks
difficulty peeing
loss of bladder or bowel control (peeing or pooing yourself)
chest pain
it started after a serious accident, such as a car accident