Musclular strain. Muscular strain by far.
Need more info. Just telling you the cause with the highest incidence in males is not going to help you. It depends on mechanism of injury, where the pain is located, does the pain radiate down the legs (if so, where?), what activities/positions make the pain worse, do you have numbness/tingling/weakness of the legs, does the your back hurt when you press on it. Basically you need to be evaluated.
45-year old male. Low back pain for a few years, although seldom have pain. What kind of exercise is allowed, and what kind of bed, firm or soft?
Back pain hygiene. There are a lot of advice, but the main things are: keep your back muscles strong by doing back exercises everyday, twice daily if you can, with stretching and warm ups in between. Other exercises to strengthen your core is also important (like plank and certain Yoga poses). Use your legs to lift things, not your back. And sleep on a firm (er) mattress.
Variety of things. Hard to say, anything from a disc herniation to a muscle strain.
Severe low back pain. There are many causes of low back pain, but most commonly sudden severe low back pain is from a tear, bulge, or herniation of an intervertebral disc. Depending on your age and other factors, your symptoms can be from other causes as well, such as a slippage of one vertebra on another, or other less common causes. You should see a physiatrist or other spine specialist for evaluation.
Spine Pain Options. This chronic pain in the distribution as you suggested is the result of an irritated nerve or facet joints or other injury typically in the lumbar spine (low back) which are caused by herniated disks, spinal stenosis or degenerative disc disease, etc requiring further evaluation by a spine specialist and may be candidate for facet injections/radiofrequency ablation and epidural steroid injection.
First, a complete. Examination including a careful history and through physical exam followed when indicated by tests that can include: x-rays, ct scan, mri, bone scan, myleogram, facet blocks, selective nerve root blocks, discogram, blood tests as well as responses to treatment and revaluations.
Many Possibilities. Depending on how long it's been going on, I would consider an evaluation by a spine specialist. Sometimes it could be a muscle imbalance, early onset arthritis or scoliosis. Also could be a pinched nerve/herniated disc. Either way it might be good to figure it out and get appropriate treatment.
Many. A kidney stone or a kidney infection can cause low back pain and flank pain. It largely depends on the other symptoms you're having. The pain with kidneys would be near the bottom of the ribcage. Difficult to say for sure without examining you. Please see your pcp if the pain continues.
Various. Various kidney problems including infection, stones; vascular problems -- like abdominal aortic aneurysm, ; muscle sprain; shingles and herpes zoster break-out; thoracic spine or lumbar spine arthritis, pinched nerve in lower thoracic spine, there are many such causes -- including more urgent issues. See your doctor, for an examination to figure out which of these could be causing your symptoms.
Sciatica. This pain pattern is correlate with pelvic girdle dysfunction, which medical literature reports to be the pain generator in up to 30% of people with chronic low back pain. For more information about this topic see my chronic pain board at quora. Com.
Evaluate Low Back. If you are not improving have your doctor order a lumbar spine mri. Many times a herniated disc in the back can cause leg pain especially if you have not improved with the medications and physical therapy. If it is a herniated disc you may need evaluation from a spine specialist to determine what other options might be needed (injections, surgery, etc) to help reduce pain.
Back spasms. The most common cause of low back pain in a young person is back strain or spasms. There are a large number of big muscles in the back that can be strained by activities. These respond with spasms that can be extremely painful. The usual treatments include physical therapy, heat, mild massage. If there is radiating pain, (pain that "shoots" into a leg), you may need further work-up by your pcp.
I'm female age 47. I have been waking up in the middle if the night with low back pain every night for the past couple 2-3 months. Cause?
Causes of back pain. There are many possible causes of this symptom. There is not enough information here to decide. For many people, tired, sore muscles in the back cause this symptom. A worn mattress could be the cause. This could also be caused by a problem with the bones or nerve roots, a kidney stone, or blood vessels. Hope this gives you some idea to start with.