Low back pain (LBP) is a common disorder involving the muscles, nerves, and bones of the back.[4] Pain can vary from a dull constant ache to a sudden sharp feeling.[4] Low back pain may be classified by duration as acute (pain lasting less than 6 weeks), sub-chronic (6 to 12 weeks), or chronic (more than 12 weeks).[3] The condition may be further classified by the underlying cause as either mechanical, non-mechanical, or referred pain.[5] The symptoms of low back pain usually improve within a few weeks from the time they start, with 40–90% of people completely better by six weeks.[2]
Acupuncture is no better than placebo, usual care, or sham acupuncture for nonspecific acute pain or sub-chronic pain.[87] For those with chronic pain, it improves pain a little more than no treatment and about the same as medications, but it does not help with disability.[87] This pain benefit is only present right after treatment and not at follow-up.[87] Acupuncture may be a reasonable method to try for those with chronic pain that does not respond to other treatments like conservative care and medications.[1][88]

Without changing the position of your knees, bend at your hips and lower your torso until it’s almost parallel to the floor (or as far as you can comfortably go without rounding your back). Pause, then lift your torso back to the starting position. Be sure to squeeze your glutes and push your hips forward to lift your torso back to the starting position. This ensures you’re engaging your hip muscles instead of relying on your lower back. Do 10 reps total.

Stretching the hip muscles that sit on top of the bursae, part of the lining in your hip joint, can give you some relief from bursitis pain. Kneel on the leg that's giving you the pain, holding on to something sturdy for balance. Tilt your pelvis forward, tightening your gluteus muscles (the muscles in your buttocks). Then lean away from the side of your hip that hurts, for instance to the left if you're kneeling on your right knee. You should feel a stretch from the top of your hip bone down the side of your leg to your knee, Humphrey says. Hold the stretch for 30 seconds and repeat once or twice.
NINDS health-related material is provided for information purposes only and does not necessarily represent endorsement by or an official position of the National Institute of Neurological Disorders and Stroke or any other Federal agency. Advice on the treatment or care of an individual patient should be obtained through consultation with a physician who has examined that patient or is familiar with that patient's medical history.
Running: Running may be good for boosting your cardiovascular health but it can be very strenuous if you have hip pain. The impact can upset your hip joints so instead focus on other forms of exercise. Walking is still a good option for hip pain if you really feel like working out in the great outdoors or you could instead try some strengthening exercises from the comfort of your own home.
Located deep in the front of the hip and connecting the leg, pelvis, and abdomen, the hip flexors— surprise, surprise— flex the hip. But despite being some of the most powerful muscles in our bodies (with a clearly important role), it’s easy to neglect our poor hip flexors— often without even knowing it. It turns out just working at a desk all day (guilty!) can really weaken hip flexors since they tend to shorten up while in a seated position. This tightness disrupts good posture and is a common cause of lower back pain. Weakened hip flexors can also increase the risk of foot, ankle, and knee injuries (especially among runners) Hip muscle weakness and overuse injuries in recreational runners. Niemuth, P.E., Johnson, R.J., Myers, M.J., et al. Rocky Mountain University of Health Professions, Provo, VT. Clinical Journal of Sport Medicine, 2005 Jan; 15 (1): 14-21.. So be sure to get up, stand up every hour or so! And giving the hip flexors some extra attention is not just about injury prevention. Adding power to workouts, working toward greater flexibility, and getting speedier while running is also, as they say, all in the hips The effect of walking speed on muscle function and mechanical energetics. Neptune, R.R., Sasaki, K., and Kautz, S.A. Department of Mechanical Engineering, The University of Texas, Austin, TX. Gait & Posture, 2008 Jul; 28 (1): 135-43..
Take a step back and think about where you spend most of your day. If you're a young athlete, you probably spend most of your time at school or maybe work or practice and  even a little time at home, if you're lucky. Now think about what position your body is in during those periods. I would bet that you spend most of your day sitting down. You may walk to class or run in practice, but the majority of your day is spent in a seated position.
Initial management with non–medication based treatments is recommended.[6] NSAIDs are recommended if these are not sufficiently effective.[6] Normal activity should be continued as much as the pain allows.[2] Medications are recommended for the duration that they are helpful.[13] A number of other options are available for those who do not improve with usual treatment. Opioids may be useful if simple pain medications are not enough, but they are not generally recommended due to side effects.[4][13] Surgery may be beneficial for those with disc-related chronic pain and disability or spinal stenosis.[14][15] No clear benefit has been found for other cases of non-specific low back pain.[14] Low back pain often affects mood, which may be improved by counseling or antidepressants.[13][16] Additionally, there are many alternative medicine therapies, including the Alexander technique and herbal remedies, but there is not enough evidence to recommend them confidently.[17] The evidence for chiropractic care[18] and spinal manipulation is mixed.[17][19][20][21]
_{Tight hip flexors can result in lower back pain, hip pain and injury.  A lot of strain is put on those muscles during activities that involve sprinting and kicking.  For example, runners are more prone to hip flexor injuries because of the small, repetitive movement during running.   But even if you’re not an athlete, hip flexor injuries can occur during everyday activities (for instance, slipping and falling or running to catch a bus).  When those tight muscles are suddenly stretched beyond what they are accustomed to, you might also experience pain in the upper groin region, typically where the hip meets the pelvis.}   
How to do it: Stand with your feet together, holding dumbbells by your sides. Take a wide step out to your right and lower into a side lunge, reaching dumbbells on either side of right leg [as shown]. Bend your left knee and shift your weight into both legs, into a wide squat position, reaching the dumbbells to floor in front of you, then extend your right leg and shift your weight to the left, moving into a side lunge with your left leg.
_{Sit on floor with knees bent and shins stacked with right leg on top. Use your hand to position right ankle on left knee. Ideally, the right knee will rest on the left thigh, but if your hips are tight, your right knee may point up toward the ceiling (overtime, as your hips become more open, your knee will lower). Keeping your hips squared to the front of the room, hinge at the hips and slowly walk hands slightly forward. If this is enough of a stretch, hold here, or fold your torso over your thighs to go deeper. Hold for at least 30 seconds, then repeat on opposite side.}
If your hips are killing you, you probably spend a lot of time sitting – in the car, at work, on that spinning seat – which puts your hips in near-constant “flexion”, says Cori Lefkowith, NASM-certified personal trainer and owner of Redefining Strength in Orange County, California. Even running involves a repetitive flexion movement that can cause pain.
Exercise therapy is effective in decreasing pain and improving function for those with chronic low back pain.[50] It also appears to reduce recurrence rates for as long as six months after the completion of program[61] and improves long-term function.[57] There is no evidence that one particular type of exercise therapy is more effective than another.[62] The Alexander technique appears useful for chronic back pain,[63] and there is tentative evidence to support the use of yoga.[64] Transcutaneous electrical nerve stimulation (TENS) has not been found to be effective in chronic low back pain.[65] Evidence for the use of shoe insoles as a treatment is inconclusive.[51] Peripheral nerve stimulation, a minimally-invasive procedure, may be useful in cases of chronic low back pain that do not respond to other measures, although the evidence supporting it is not conclusive, and it is not effective for pain that radiates into the leg.[66]
Disc degeneration remains a key cause of chronic low back pain and the pain often persists despite surgery. NIH-funded basic science and preclinical studies are investigating molecular-level mechanisms that cause discs in the spine to degenerate, as well as protective mechanisms involved in disc remodeling that may diminish with advancing age. Such studies may help identify future therapeutic strategies to block degenerative mechanisms or promote remodeling processes. NIH also is funding early research on stem cell approaches to promote disc regeneration and rejuvenate cells of the nucleus pulposus, the jelly-like substance in the center of intervertebral discs that loses water content as people age.
Talmage, J; Belcourt, R; Galper, J; et al. (2011). "Low back disorders". In Kurt T. Hegmann. Occupational medicine practice guidelines : evaluation and management of common health problems and functional recovery in workers (3rd ed.). Elk Grove Village, IL: American College of Occupational and Environmental Medicine. pp. 336, 373, 376–377. ISBN 978-0615452272.

In the elderly, atherosclerosis can cause weakening of the wall of the large arterial blood vessel (aorta) in the abdomen. This weakening can lead to a bulging (aneurysm) of the aorta wall. While most aneurysms cause no symptoms, some cause a pulsating low back pain. Aneurysms of certain size, especially when enlarging over time, can require surgical repair with a grafting procedure to repair the abnormal portion of the artery.